Menachot Daf 40 (מנחות דף מ׳)

📖 Breakdown

Amud Aleph (40a)

Segment 1

TYPE: ברייתא

Beit Shammai and Beit Hillel dispute whether a linen cloak requires tzitzit

Hebrew/Aramaic:

תָּנוּ רַבָּנַן: סָדִין בְּצִיצִית – בֵּית שַׁמַּאי פּוֹטְרִין וּבֵית הִלֵּל מְחַיְּיבִין, וַהֲלָכָה כְּדִבְרֵי בֵּית הִלֵּל.

English Translation:

The Sages taught in a baraita: With regard to ritual fringes on a linen cloak, Beit Shammai deem the cloak exempt from ritual fringes due to the fact that the sky-blue strings must be made from wool, and there is a Torah prohibition against wearing a mixture of wool and linen. And Beit Hillel deem a linen cloak obligated in the mitzva of ritual fringes. And the halakha is in accordance with the statement of Beit Hillel.

קלאוד על הדף:

This baraita introduces the central tension of the sugya: the clash between the mitzva of tzitzit and the prohibition of sha’atnez (mixing wool and linen). Since tekhelet strings are made from wool, attaching them to a linen garment creates a sha’atnez situation. Beit Shammai exempt the garment entirely to avoid the prohibition, while Beit Hillel maintain that the positive mitzva of tzitzit overrides the prohibition. The halakha follows Beit Hillel — yet as the Gemara will explore, various rabbinic decrees were nevertheless enacted to restrict this practice.

Key Terms:

• סָדִין = A linen cloak or sheet used as a garment
• שַׁעַטְנֵז = The Torah prohibition against wearing a garment containing both wool and linen (Deuteronomy 22:11)

Segment 2

TYPE: קושיא

Rabbi Eliezer ben Rabbi Tzadok: wearing tekhelet on linen in Jerusalem causes astonishment

Hebrew/Aramaic:

אָמַר רַבִּי אֱלִיעֶזֶר בֶּן רַבִּי צָדוֹק: וַהֲלֹא כׇּל הַמֵּטִיל תְּכֵלֶת בִּירוּשָׁלַיִם אֵינוֹ אֶלָּא מִן הַמַּתְמִיהִין!

English Translation:

Rabbi Eliezer ben Rabbi Tzadok says: But is it not the case that anyone who affixes sky-blue strings to a linen cloak in Jerusalem is considered nothing other than one of those who causes others to be astonished at their behavior, as it appears that he is violating the prohibition against wearing a garment containing wool and linen?

קלאוד על הדף:

Rabbi Eliezer ben Rabbi Tzadok reports the social reality in Jerusalem: even though halakha permits wool tekhelet on linen garments, onlookers who don’t understand the halakhic basis view it as a brazen violation of sha’atnez. This introduces a crucial concept — מראית עין (appearance of wrongdoing). Even a technically permitted act may be restricted if it gives the impression of sin, particularly when the general public is not learned enough to understand the exception.

Key Terms:

• מַתְמִיהִין = Those who cause astonishment or bewilderment — people who appear to be acting improperly

Segment 3

TYPE: מימרא

Rabbi Yehuda HaNasi: the Sages prohibited it because people are not well versed in the halakha

Hebrew/Aramaic:

אָמַר רַבִּי: אִם כֵּן, לָמָּה אֲסָרוּהָ? לְפִי שֶׁאֵין בְּקִיאִין.

English Translation:

The baraita concludes: Rabbi Yehuda HaNasi says: If so, that the halakha is in accordance with Beit Hillel and a linen cloak is required to have ritual fringes, why did the Sages prohibit attaching ritual fringes to linen garments in Jerusalem? It is because people are not well versed in the halakha and might ultimately wear garments of wool and linen even when it is not necessary for the mitzva of ritual fringes.

קלאוד על הדף:

Rabbi Yehuda HaNasi acknowledges that the Torah law follows Beit Hillel, but explains the rabbinic prohibition as a practical safeguard. If people see wool-and-linen mixtures being worn in the context of tzitzit, they may come to wear sha’atnez in non-mitzva contexts as well, since they lack the sophistication to distinguish between permissible and impermissible cases. This is a classic example of a rabbinic fence (גזירה) — restricting a permitted act to prevent people from stumbling into a genuine prohibition.

Key Terms:

• בְּקִיאִין = Well versed, expert — here meaning the general public lacks sufficient halakhic knowledge
• גְּזֵירָה = A rabbinic decree enacted as a protective fence around Torah law

Segment 4

TYPE: קושיא ותירוץ

Rava bar Rav Chana suggests publicizing the permission; Rava rejects this

Hebrew/Aramaic:

אֲמַר לֵיהּ רָבָא בַּר רַב חָנָא לְרָבָא: וְלִרְמוֹ בֵּי עַשְׂרָה וְנִפְּקוּ לְשׁוּקָא וּמִפַּרְסְמָא (למילתא) [מִילְּתָא]! כׇּל שֶׁכֵּן דְּמַתְמְהוּ עִילָּוַן.

English Translation:

Rava bar Rav Ḥana said to Rava: If that is the concern, then let ten people take linen cloaks with ritual fringes and go out to the marketplace and thereby publicize the matter, i.e., that it is permitted to affix wool strings to a linen garment due to the mitzva. Rava answered: All the more so people would be astonished at us for acting in such an unconventional manner.

קלאוד על הדף:

This exchange highlights the difficulty of reversing an established rabbinic restriction once public perception has set in. Rava bar Rav Chana proposes a publicity campaign — if prominent scholars visibly wear the combination, the public will learn it is permitted. But Rava counters that such a demonstration would backfire: seeing a group of rabbis apparently violating sha’atnez would cause even greater scandal. Once a practice appears wrong to the public, even authoritative figures cannot easily normalize it.

Key Terms:

• פִּרְסוּמֵי מִילְּתָא = Publicizing the matter — making a halakhic ruling known through public demonstration

Segment 5

TYPE: קושיא ותירוץ

Suggestion to teach it publicly; answer: concern about indigo dye (kala ilan)

Hebrew/Aramaic:

וְלִידְרְשַׁהּ בְּפִירְקָא! גְּזֵירָה מִשּׁוּם קָלָא אִילָן.

English Translation:

The Gemara suggests: Let the Rabbis teach during their public lecture that affixing wool strings to a linen garment is permitted for the mitzva of ritual fringes. The Gemara answers: Wearing strings on a linen garment is prohibited because of a rabbinic decree due to the concern that people might use strings that were dyed blue with indigo [kala ilan], instead of with tekhelet, the sky-blue dye produced from the ḥilazon (see 44b), in which case they would not fulfill the mitzva of ritual fringes and would violate the prohibition against wearing garments containing wool and linen.

קלאוד על הדף:

The Gemara shifts to a deeper reason for the prohibition. Even if the public were educated, there is a practical concern: indigo (kala ilan) is visually indistinguishable from authentic tekhelet but does not fulfill the mitzva. If someone uses counterfeit tekhelet on a linen garment, the positive mitzva that would override sha’atnez is absent, and the wearer violates the prohibition of sha’atnez with no mitzva to justify it. This introduces the idea that the prohibition is not merely about appearances but about the risk of genuine transgression.

Key Terms:

• קָלָא אִילָן = Indigo plant dye — visually resembles tekhelet but is not derived from the chilazon and therefore invalid for the mitzva
• פִּירְקָא = A public Torah lecture given by the Sages

Segment 6

TYPE: קושיא ותירוץ

Let the wool strings count as white; rejected because same-type strings are possible

Hebrew/Aramaic:

וְלֹא יְהֵא אֶלָּא לָבָן! כֵּיוָן דְּאֶפְשָׁר בְּמִינָן – לָא.

English Translation:

The Gemara suggests: Even if one’s blue strings are not dyed with tekhelet as required for the mitzva, let them be considered merely as white strings. In the absence of tekhelet one fulfills the mitzva with white strings, and therefore it should be permitted to affix white woolen strings to a linen garment. The Gemara explains: Since it is possible to affix white strings that are the same type of material as the garment, i.e., linen, and thereby fulfill the mitzva without overriding the prohibition against wearing a garment made from wool and linen, one may not affix white wool strings to a linen garment.

קלאוד על הדף:

The Gemara tries yet another angle: even if the blue dye is counterfeit, the wool strings should at least count as “white” strings, which independently fulfill the mitzva. This clever argument would preserve the mitzva override even without valid tekhelet. The Gemara rejects this based on Reish Lakish’s principle (elaborated in the next segment): when you can fulfill both the positive mitzva and avoid the prohibition — by using linen strings on a linen garment — you must do so. The override only applies when there is no alternative.

Key Terms:

• לָבָן = White strings — one can fulfill the mitzva of tzitzit with white strings alone when tekhelet is unavailable
• מִינָן = Of its own type — linen strings for a linen garment

Segment 7

TYPE: מימרא

Reish Lakish’s principle: fulfill both the positive mitzva and the prohibition when possible

Hebrew/Aramaic:

כִּדְרֵישׁ לָקִישׁ, דְּאָמַר רֵישׁ לָקִישׁ: כׇּל מָקוֹם שֶׁאַתָּה מוֹצֵא עֲשֵׂה וְלֹא תַעֲשֶׂה, אִם אַתָּה יָכוֹל לְקַיֵּים אֶת שְׁנֵיהֶם – מוּטָב, וְאִם לָאו – יָבוֹא עֲשֵׂה וְיִדְחֶה אֶת לֹא תַעֲשֶׂה.

English Translation:

The Gemara notes: This is in accordance with the opinion of Reish Lakish. As Reish Lakish says: Any place where you find a positive mitzva and a prohibition that clash with one another, if you are able to fulfill both of them, that is preferable; and if that is not possible, the positive mitzva shall come and override the prohibition. In this case, the clash is between the mitzva of ritual fringes and the prohibition against wearing a garment that contains wool and linen. One can fulfill both of them by using white strings that are linen instead of wool if the garment is made from linen.

קלאוד על הדף:

This is a foundational halakhic principle with broad application. The concept of עשה דוחה לא תעשה (a positive mitzva overrides a prohibition) is not absolute — it only applies when there is genuinely no way to fulfill both. Here, since one can use linen strings on a linen garment and thereby fulfill tzitzit without violating sha’atnez, the override is unnecessary and impermissible. This principle is codified by the Rambam (Fringes 3:6) and has ramifications far beyond the tzitzit context.

Key Terms:

• עֲשֵׂה דּוֹחֶה לֹא תַעֲשֶׂה = A positive mitzva overrides a prohibition — but only when there is no alternative way to fulfill both

Segment 8

TYPE: קושיא ותירוץ

Suggestion to test the dye; answer: concern about tekhelet used for testing (te’ima)

Hebrew/Aramaic:

וְלִיבְדְּקוּהָ, אֶלָּא גְּזֵירָה מִשּׁוּם טְעִימָה.

English Translation:

The Gemara suggests: And let them test the strings to ascertain whether they are dyed with indigo or with tekhelet, as explained by the Gemara (42b). The Gemara responds: Rather, the prohibition against affixing ritual fringes to a linen garment is a rabbinic decree due to the concern that perhaps the sky-blue strings were colored with tekhelet dye that had been used for testing the color of the dye in the vat and therefore became unfit (see 42b). In such a case, there would be no fulfillment of the mitzva of sky-blue ritual fringes to override the prohibition against wearing a garment of wool and linen.

קלאוד על הדף:

The Gemara addresses the obvious solution: test the dye to confirm it is genuine tekhelet. But even authentic tekhelet can be problematic — if the dye was originally prepared as a sample batch to test the color of the vat (te’ima), it was not produced for the sake of the mitzva, rendering it unfit. This scenario cannot be detected through any test, since the dye itself is chemically identical to valid tekhelet. The problem is one of intent (lishmah), not substance.

Key Terms:

• טְעִימָה = Testing/sampling — tekhelet dye used to test the color in the vat, which is unfit for the mitzva because it was not produced for that purpose

Segment 9

TYPE: קושיא ותירוץ

Suggestion to send letters; Rava begins a kal vachomer argument

Hebrew/Aramaic:

וְלִיכְתְּבָה אַדִּיסְקֵי! אַדִּיסְקֵי לֵיקוּם וְלִיסְמוֹךְ? אָמַר רָבָא: הַשְׁתָּא

English Translation:

The Gemara suggests: Let the Sages write letters informing dye producers that tekhelet that was used for testing the color of the dye in the vat is unfit for ritual fringes. The Gemara explains: Shall we go and rely on letters, assuming that dye producers will follow the instructions they contain? Rava responded to this and said: Now,

קלאוד על הדף:

The Gemara proposes a regulatory solution: send official letters to dye producers instructing them not to sell test-batch tekhelet for mitzva use. The initial reaction is skepticism — can we really rely on written instructions being followed? Rava begins to counter this skepticism with a kal vachomer (a fortiori) argument that continues on amud bet, comparing the reliance on letters for far more serious matters like the calendar.

Key Terms:

• דִּיסְקֵי = Official letters or documents — written communications from the rabbinical authorities
• קַל וָחוֹמֶר = A fortiori argument — if we rely on letters for more severe matters, surely we can for less severe ones

Amud Bet (40b)

Segment 1

TYPE: תירוץ

Rava’s kal vachomer: we rely on letters for karet-level prohibitions, all the more so for tzitzit

Hebrew/Aramaic:

חָמֵץ בְּפֶסַח וְיוֹם הַכִּפּוּרִים דְּכָרֵת – סָמְכִינַן אַדִּיסְקֵי, הָכָא דַּעֲשֵׂה בְּעָלְמָא לֹא כׇּל שֶׁכֵּן!

English Translation:

with regard to the prohibitions against eating leavened bread on Passover and eating on Yom Kippur, which are punishable by karet, we rely on letters sent from the rabbinical court in Eretz Yisrael publicizing whether the year was declared a leap year and when they have declared the New Moon; here, with regard to the mitzva of ritual fringes, which is merely a positive mitzva, is it not all the more so correct that letters can be relied on?

קלאוד על הדף:

Rava completes the kal vachomer argument begun on the previous amud. The communities in Babylonia relied on written letters from the Beit Din in Eretz Yisrael to know when Rosh Chodesh was declared and whether a leap year was added — determinations that affect whether one violates the karet-level prohibitions of chametz on Pesach and eating on Yom Kippur. If letters are trusted for such severe matters, they should certainly suffice for the comparatively lighter matter of tzitzit dye production. Having refuted all the previously proposed reasons, the Gemara now seeks the true reason for the rabbinic decree.

Key Terms:

• כָּרֵת = Spiritual excision — one of the most severe Torah punishments, applied to eating chametz on Pesach and eating on Yom Kippur

Segment 2

TYPE: מימרא

Rava’s true reason: concern that one might sew a torn cloak and use the sewing thread as tzitzit

Hebrew/Aramaic:

אֶלָּא אָמַר רָבָא: הָא מִילְּתָא אָמְרִי, וְאִיתְּמַר בְּמַעְרְבָא מִשּׁוּם דְּרַבִּי זֵירָא כְּוָותִי: שֶׁמָּא יִקָּרַע סְדִינוֹ בְּתוֹךְ שָׁלֹשׁ וְיִתְפְּרֶנּוּ.

English Translation:

Rather, Rava said: This is a statement that I said, and it was stated in the West, Eretz Yisrael, in the name of Rabbi Zeira in accordance with my opinion: The reason for the rabbinic decree is lest one’s cloak rip within three fingerbreadths of the edge of the corner of the garment, which is where the ritual fringes are placed, and he sew it with linen string and then use the excess string for ritual fringes.

קלאוד על הדף:

After systematically rejecting four proposed reasons for the decree (public ignorance, indigo fraud, the testing issue, and the letter solution), Rava presents the definitive reason. The concern is specific and practical: if someone’s linen garment tears near the corner where the tzitzit are attached, he might repair the tear with linen thread and then use the leftover thread as tzitzit strings. Since those threads were placed there for sewing, not for the mitzva, they violate the principle of תעשה ולא מן העשוי. Rava proudly notes that Rabbi Zeira in Eretz Yisrael independently reached the same conclusion.

Key Terms:

• תּוֹךְ שָׁלֹשׁ = Within three fingerbreadths — a halakhically significant measurement for the placement of tzitzit near the garment’s edge

Segment 3

TYPE: גמרא

Explaining the “prepare it, not from what has already been prepared” principle

Hebrew/Aramaic:

וְהַתּוֹרָה אָמְרָה: ״תַּעֲשֶׂה״ – וְלֹא מִן הֶעָשׂוּי.

English Translation:

And in such a case the ritual fringes would be unfit because the Torah states: “You shall prepare yourself twisted cords” (Deuteronomy 22:12), which teaches: Prepare it, and not from what has already been prepared. Consequently, the strings must be attached to the garment for the sake of the mitzva of ritual fringes. When the individual places the linen string there in order to stitch the garment and then decides to use it for the mitzva of ritual fringes and adds sky-blue wool strings, he does not fulfill the mitzva of ritual fringes and violates the prohibition against wearing a garment of wool and linen.

קלאוד על הדף:

The Gemara elaborates on the core problem. The phrase תעשה — “you shall make” — implies active, intentional creation for the purpose of the mitzva. Strings that were originally placed for sewing and subsequently repurposed for tzitzit fail this requirement. The practical consequence is severe: if the “white” linen strings are invalid as tzitzit, there is no mitzva to override the sha’atnez prohibition, and adding tekhelet (wool) strings creates an outright violation. This principle of תעשה ולא מן העשוי has broad applications throughout halakha, including sukkah construction and tefillin.

Key Terms:

• תַּעֲשֶׂה וְלֹא מִן הֶעָשׂוּי = “Prepare it, and not from what has already been prepared” — strings must be attached for the sake of the mitzva, not repurposed from another function

Segment 4

TYPE: גמרא

Rabbi Zeira removes his tzitzit from his linen cloak; Rav Zeira adds: concern about nighttime garments

Hebrew/Aramaic:

שְׁרָא רַבִּי זֵירָא לִסְדִינֵיהּ. רַב זֵירָא אָמַר: גְּזֵירָה נָמֵי מִשּׁוּם כְּסוּת לַיְלָה.

English Translation:

Because of this rabbinic decree, Rabbi Zeira untied the ritual fringes and removed them from his linen cloak. Rav Zeira said: The rabbinic decree prohibiting ritual fringes on a linen garment is also due to the concern that one might affix ritual fringes to a nighttime garment. Since the mitzva of ritual fringes does not apply in that case, if one wears the garment he would not fulfill the mitzva and would violate the prohibition against wearing a garment with wool and linen.

קלאוד על הדף:

Two related but distinct points emerge here. First, Rabbi Zeira practices what he preaches — upon accepting the decree, he immediately removes the tzitzit from his own linen garment. Second, Rav Zeira (note: a different figure from Rabbi Zeira) adds an additional basis for the decree: the mitzva of tzitzit does not apply at night (based on “and you shall see them” — Numbers 15:39). If someone wears a linen garment with wool tekhelet strings at night, there is no mitzva override, and he simply violates sha’atnez. This concern about nighttime garments is ultimately codified by the Rambam as the primary reason for the decree.

Key Terms:

• כְּסוּת לַיְלָה = A nighttime garment — exempt from the mitzva of tzitzit since the mitzva requires visual observation (“and you shall see them”)

Segment 5

TYPE: מימרא

Rava/Rabbi Zeira: cloth garment with leather corners requires tzitzit; leather with cloth corners is exempt

Hebrew/Aramaic:

וְאָמַר רָבָא: הָא מִילְּתָא אֲמַרִי, וְאִיתְּמַר בְּמַעְרְבָא מִשְּׁמֵיהּ דְּרַבִּי זֵירָא כְּוָותִי: הִיא שֶׁל בֶּגֶד וּכְנָפֶיהָ שֶׁל עוֹר – חַיֶּיבֶת, הִיא שֶׁל עוֹר וּכְנָפֶיהָ שֶׁל בֶּגֶד – פְּטוּרָה. מַאי טַעְמָא? עִיקַּר בֶּגֶד בָּעֵינַן.

English Translation:

And Rava said: This is a statement that I said, and it was stated in the West, Eretz Yisrael, in the name of Rabbi Zeira in accordance with my opinion: If a garment is made from cloth and its corners are made from leather, it is required to have ritual fringes. Conversely, if a cloak is made from leather and its corners are made from cloth, it is exempt from the mitzva of ritual fringes. What is the reason for this? We require that the main part of the garment be obligated, and a leather garment is not required to have ritual fringes.

קלאוד על הדף:

The Gemara now transitions to a new topic: what determines a garment’s obligation in tzitzit when it is made from mixed materials? Rava and Rabbi Zeira independently establish that the primary body of the garment — not the corners — determines the obligation. Since the Torah says “on the corners of their garments,” the corners are merely where the tzitzit are placed, but the “garment” status is determined by the main body. A cloth garment with leather corners is still a “cloth garment” and requires tzitzit; a leather garment with cloth corners remains exempt. This ruling is codified in Shulchan Aruch OC 10:4.

Key Terms:

• עִיקַּר בֶּגֶד = The main part of the garment — what determines the garment’s halakhic status for tzitzit obligation
• כָּנָף = Corner — where the tzitzit strings are attached

Segment 6

TYPE: מחלוקת

Rav Achai follows the corner material instead

Hebrew/Aramaic:

רַב אַחַאי אָזֵיל בָּתַר כָּנָף.

English Translation:

The Gemara notes: Rav Aḥai would follow the corner in determining whether the garment is required to have ritual fringes or not, because the Torah states: “On the corners of their garments” (Numbers 15:38).

קלאוד על הדף:

Rav Achai presents a dissenting view: since the Torah specifically mentions “corners” as the locus of the tzitzit obligation, the material of the corners should determine whether tzitzit are required. This reading emphasizes the corner as the operative halakhic unit rather than the garment as a whole. However, the halakha does not follow Rav Achai — the mainstream ruling follows Rava’s position that the body of the garment is determinative. Nevertheless, this minority view illustrates an important hermeneutical debate about what the Torah means by “on the corners of their garments.”

Key Terms:

• אָזֵיל בָּתַר כָּנָף = Follows the corner — determines the tzitzit obligation based on the material of the corner, not the body

Segment 7

TYPE: מימרא

Rav Huna: affixing tzitzit to a three-cornered garment and then adding a fourth corner is invalid

Hebrew/Aramaic:

אָמַר רָבָא אָמַר רַב סְחוֹרָה אָמַר רַב הוּנָא: הֵטִיל לְבַעֲלַת שָׁלֹשׁ, וְהִשְׁלִימָהּ לְאַרְבַּע – פְּסוּלָה, ״תַּעֲשֶׂה״ – וְלֹא מִן הֶעָשׂוּי.

English Translation:

§ Rava says that Rav Seḥora says that Rav Huna says: In a case where one affixed ritual fringes to a garment possessing only three corners, which is not required to have ritual fringes, and then completed its fourth corner by sewing on additional material or cutting away some of the material, the ritual fringes he attached to the original three corners are unfit. This is due to the principle: Prepare it, and not from what has already been prepared. Once the garment is required to have ritual fringes one may attach the ritual fringes; the strings that were attached before the garment was required to have them are not fit.

קלאוד על הדף:

This passage applies the תעשה ולא מן העשוי principle to a new scenario. A garment with only three corners is exempt from tzitzit (which requires four corners). If someone places tzitzit on three corners and then adds a fourth corner, the previously attached strings are retroactively invalid — they were placed when there was no obligation. The strings must be removed and reattached after the fourth corner exists. This underscores how the mitzva demands intentional, properly-timed action, not merely having the physical components in place.

Key Terms:

• בַּעֲלַת שָׁלֹשׁ = A garment possessing three corners — exempt from tzitzit since the Torah specifies “four corners” (Deuteronomy 22:12)

Segment 8

TYPE: קושיא ותירוץ

Objection from the pious men who attached tzitzit early; reinterpretation of the baraita

Hebrew/Aramaic:

מֵיתִיבִי: חֲסִידִים הָרִאשׁוֹנִים, כֵּיוָן שֶׁאָרְגוּ בָּהּ שָׁלֹשׁ, הָיוּ מְטִילִין לָהּ תְּכֵלֶת. אֵימָא: כֵּיוָן שֶׁפָּצְעוּ בָּהּ שָׁלֹשׁ, הָיוּ מְטִילִין לָהּ תְּכֵלֶת.

English Translation:

The Gemara raises an objection from a baraita: It is told of the early generations of pious men that once they weaved three fingerbreadths of the length of the garment, they would affix the white and sky-blue strings to the first two corners, even though the garment was not yet long enough to be obligated to have ritual fringes. The Gemara answers: Say that the baraita should read as follows: Once they completed [shepatzu] the garment until there were only three fingerbreadths left to weave, they would affix the white and sky-blue strings to the first two corners.

קלאוד על הדף:

The Gemara challenges Rav Huna’s ruling from a baraita about the חסידים הראשונים (early pious men) who would attach tzitzit while still weaving the garment. If they attached strings when only three fingerbreadths were woven, the garment was surely not yet obligated — contradicting the principle of תעשה ולא מן העשוי. The Gemara resolves this by reinterpreting the baraita: “three” refers not to having woven three fingerbreadths from the beginning, but to having only three fingerbreadths remaining to complete. At that point the garment was essentially complete and already obligated, so the early attachment was valid.

Key Terms:

• חֲסִידִים הָרִאשׁוֹנִים = The early pious men — figures known for exemplary religious observance beyond the letter of the law
• פָּצְעוּ = Completed (in this context) — an alternate reading meaning they had nearly finished weaving

Segment 9

TYPE: קושיא

Challenge: does R. Zeira’s ruling about adding tzitzit to a garment that already has them contradict the principle?

Hebrew/Aramaic:

וּמִי אָמְרִינַן ״תַּעֲשֶׂה״ – וְלֹא מִן הֶעָשׂוּי? (אִינִי), וְהָאָמַר רַבִּי זֵירָא: הֵטִיל לְמוּטֶּלֶת – כְּשֵׁרָה.

English Translation:

The Gemara asks: And do we say: Prepare it, and not from what has already been prepared? Is that so that this principle disqualifies ritual fringes that one affixed to a garment before he was required to do so? But doesn’t Rabbi Zeira say: If one affixed ritual fringes to a garment that already had ritual fringes affixed to it and then removed the original strings, it is fit, despite the fact that when he attached the second set they were superfluous? This indicates that even if one attaches ritual fringes to a garment when there is no obligation to attach them, the ritual fringes are fit.

קלאוד על הדף:

The Gemara brings a potentially devastating challenge from Rabbi Zeira’s own ruling. Rabbi Zeira held that if someone adds a second set of tzitzit to a garment that already has a valid set, and then removes the first set, the second set is valid — even though at the time of attachment, there was no obligation to add more. If so, why should attaching tzitzit to a three-cornered garment (before the fourth corner is added) be any different? Both cases involve attaching tzitzit when there is no current obligation. This sets up a crucial distinction that Rava will draw.

Key Terms:

• הֵטִיל לְמוּטֶּלֶת = Affixed [tzitzit] to a garment that already has them — adding a second set to a garment with an existing valid set

Segment 10

TYPE: תירוץ

Rava: the second set involves the prohibition of adding to mitzvot, which constitutes a valid “action”

Hebrew/Aramaic:

אָמַר רָבָא: הַשְׁתָּא בְּ״בַל תּוֹסִיף״ קָאֵי, מַעֲשֶׂה לָא הָוֵי?

English Translation:

Rava said: This does not present a difficulty, because now that he adds a second, unnecessary set of ritual fringes and is liable for violating the prohibition of adding to a mitzva (see Deuteronomy 13:1), is it not considered an action?

קלאוד על הדף:

Rava draws a subtle but critical distinction. When someone adds a second set of tzitzit, he violates the prohibition of בל תוסיף (do not add to the mitzvot). The very fact that this is a halakhically significant act — an act that triggers a prohibition — means it qualifies as a genuine “action” (מעשה) under the law. Therefore, when the first set is later removed, the second set can be considered as having been actively “made” for the garment. In contrast, attaching tzitzit to a three-cornered garment has no halakhic significance at all — it’s a meaningless act on a garment that has no obligation.

Key Terms:

• בַּל תּוֹסִיף = The prohibition against adding to the mitzvot (Deuteronomy 13:1) — adding an extra set of tzitzit violates this prohibition

Segment 11

TYPE: קושיא

Rav Pappa challenges: perhaps the intent was to nullify the first set, not add to it

Hebrew/Aramaic:

מַתְקֵיף לַהּ רַב פָּפָּא: מִמַּאי דְּגַבְרָא לְאוֹסוֹפֵי קָא מִיכַּוֵּין? דִּלְמָא לְבַטּוֹלֵי קָא מִיכַּוֵּין, וּ״בַל תּוֹסִיף״ לֵיכָּא, מַעֲשֶׂה אִיכָּא!

English Translation:

Rav Pappa objects to this: From where is it known that Rabbi Zeira is discussing a case where the person intended to add to the original set of ritual fringes? Perhaps Rabbi Zeira is discussing a case where he intended to nullify the original strings, and therefore there is no prohibition of adding to a mitzva, and there is an action.

קלאוד על הדף:

Rav Pappa raises a sharp objection to Rava’s reasoning. Rabbi Zeira’s case could involve someone who intends to replace the first set, not supplement it. If his intent is to nullify the original strings, there is no בל תוסיף violation — he never intended to have two sets simultaneously. Yet the second set is still valid when the first is removed. This would undermine Rava’s distinction, because without בל תוסיף, there is no significant “action” to transform the attachment into a valid mitzva act. Rav Pappa’s challenge remains unresolved, leaving the sugya in tension.

Key Terms:

• לְבַטּוֹלֵי = To nullify — intending to replace the original strings rather than add to them
• לְאוֹסוֹפֵי = To add — intending to supplement the existing tzitzit with additional ones

Segment 12

TYPE: מימרא

Shmuel: tekhelet strings are not subject to the prohibition of kilayim, even on an exempt garment

Hebrew/Aramaic:

אָמַר רַבִּי זֵירָא אָמַר רַב מַתְנָא אָמַר שְׁמוּאֵל: תְּכֵלֶת אֵין בָּהּ מִשּׁוּם כִּלְאַיִם, וַאֲפִילּוּ בְּטַלִּית פְּטוּרָה.

English Translation:

With regard to the issue of affixing ritual fringes to a garment that already has ritual fringes, the Gemara relates: Rabbi Zeira says that Rav Mattana says that Shmuel says: White and sky-blue strings are not subject to the prohibition of diverse kinds, and this is the halakha even if they are affixed to a cloak that is exempt from ritual fringes.

קלאוד על הדף:

Shmuel makes a remarkable ruling: the Torah’s permission for tzitzit to contain wool-and-linen combinations (sha’atnez) extends even to garments that are not currently obligated in the mitzva. This means the exemption from kilayim is inherent to the tzitzit strings themselves, not contingent on the garment’s obligation status. The Gemara will now explore what exactly constitutes a “cloak that is exempt” — leading to an important discussion about minimum garment sizes and the applicability of the kilayim exemption.

Key Terms:

• כִּלְאַיִם = Diverse kinds — specifically here, the prohibition against wearing a garment containing both wool and linen (sha’atnez)
• טַלִּית פְּטוּרָה = An exempt cloak — a garment that is not obligated in the mitzva of tzitzit

Segment 13

TYPE: בעיא

What is meant by “exempt cloak”? Exploring the meaning of Shmuel’s ruling

Hebrew/Aramaic:

מַאי טַלִּית פְּטוּרָה? אִילֵּימָא דְּלֵית בַּהּ שִׁיעוּרָא, וְהָתַנְיָא: טַלִּית שֶׁהַקָּטָן מִתְכַּסֶּה בּוֹ רֹאשׁוֹ וְרוּבּוֹ

English Translation:

The Gemara asks: What is meant by: A cloak that is exempt from ritual fringes? If we say that it is referring to a cloak that is not of the size necessary to require the affixing of ritual fringes, that is difficult: But isn’t it taught in a baraita: With regard to a cloak that is large enough for a minor to cover his head and most of his body with it,

קלאוד על הדף:

The Gemara begins analyzing Shmuel’s statement by asking what type of “exempt garment” he is referring to. The first suggestion — a garment too small to require tzitzit — is challenged: a baraita establishes a minimum size requirement (large enough for a minor to cover his head and most of his body), and garments smaller than this may not be exempt in the way Shmuel means. This daf ends mid-discussion, and the sugya continues on the next daf to clarify that Shmuel likely refers to a garment without four corners or a nighttime garment. The broader implication is significant for practical halakha: tzitzit strings carry an inherent exemption from kilayim that goes beyond the immediate mitzva context.

Key Terms:

• שִׁיעוּרָא = The required measure/size — the minimum dimensions of a garment for it to be obligated in tzitzit
• קָטָן = A minor — used as the standard of measurement for the minimum garment size

📝 Summary

Overview

Daf 40 focuses on the complex intersection of tzitzit and sha’atnez (forbidden wool-linen mixtures). The central question: may one attach wool tekhelet strings to a linen garment? While Beit Hillel permit this (halakha follows them), the Sages enacted a rabbinic prohibition out of concern that laypeople would not distinguish between permitted ritual use and forbidden everyday wear. The Gemara explores and rejects multiple proposals to publicize the leniency, ultimately identifying the true reasons for the decree: concern about invalid “already prepared” strings (ta’aseh v’lo min ha’asui) and nighttime wear when the mitzva doesn’t apply. The daf also addresses mixed-material garments (cloth with leather corners), the principle of ta’aseh v’lo min ha’asui in other contexts, and begins discussing exempt garments and their kilayim status.

Amud Aleph Highlights

• Beit Shammai vs. Beit Hillel: Dispute over whether linen garments require wool tzitzit (creating sha’atnez); halakha follows Beit Hillel who obligate it
• Jerusalem practice: Those who attached tekhelet to linen were called “astonishers” — Rabbi explained the Sages prohibited it due to public confusion
• Rejected solutions: Multiple proposals to publicize the permission (10 scholars in marketplace, public lectures, dye testing, producer letters) are systematically rejected
• Reish Lakish’s principle: When you can fulfill the positive mitzva while avoiding the prohibition, you must do so (favoring linen strings over wool tekhelet)
• True concern emerges: Not counterfeit dye (kala ilan) but te’ima — genuine test-batch tekhelet that looks identical but lacks mitzva status

Amud Bet Highlights

• Real reason for the decree (Rava & R. Zeira): Concern that someone will sew a torn linen corner with linen thread, then reuse that thread as tzitzit — violating ta’aseh v’lo min ha’asui
• R. Zeira’s additional concern: Nighttime garments — tzitzit obligation doesn’t apply at night, so wearing wool strings on linen at night = sha’atnez without mitzva override
• Mixed-material garments: Cloth body + leather corners = obligated in tzitzit (follow the main body); leather body + cloth corners = exempt (Rav Achai dissents)
• Ta’aseh v’lo min ha’asui applications: Attaching strings to a 3-cornered garment then adding a 4th corner invalidates them; early pious men’s practice reinterpreted
• Bal tosif as significant action: Resolves contradiction about adding/removing second set of strings
• Shmuel’s ruling: Tzitzit strings don’t create kilayim even on exempt garments — discussion begins about what “exempt garment” means

Key Disputes

Conclusions

• Wool tekhelet on linen garments is biblically permitted (following Beit Hillel) but rabbinically prohibited
• Primary reason for rabbinic decree: concern about ta’aseh v’lo min ha’asui violations (reusing sewing thread as tzitzit strings)
• Secondary concern: nighttime wear when the mitzva doesn’t apply
• Mixed-material garments: follow the main body of the garment, not the corners
• Ta’aseh v’lo min ha’asui: adding a corner after strings are attached invalidates them
• Several technical questions remain unresolved at daf’s end, including the precise definition of “exempt garment” in Shmuel’s ruling

Key Figures

Tannaim: Beit Shammai, Beit Hillel, Rabbi Eliezer ben Rabbi Tzadok, Rabbi Yehuda HaNasi (Rabbi) Amoraim: Rava bar Rav Chana, Rava, Reish Lakish, Rabbi Zeira, Rav Zeira, Rav Achai, Rav Huna, Rav Sekhorah, Rav Pappa, Shmuel, Rav Mattana

One-Line Takeaway

When ritual law collides with prohibition (tzitzit vs. sha’atnez), the biblical permission stands but rabbinic safeguards ensure laypeople won’t stumble into forbidden mixtures through technical invalidity or nighttime wear.

🎯 ELI5 (Explain Like I’m 5)

The Big Picture 🖼️

This daf is about solving a tricky problem: How do you follow TWO rules when they clash? The Torah says you must put special blue wool strings (tzitzit) on your clothes, but also says you can’t mix wool and linen. What happens if your garment is linen? The rabbis had to figure out how to handle this puzzle.

The Wool-and-Linen Puzzle 🧩

Imagine you have two rules at home: “You must wear your red team jersey to every game” and “Never wear red and blue together.” But what if your team jersey is red and your only pants are blue?

That’s what’s happening here. The Torah says put special blue WOOL strings on your garments, but also says never mix wool and linen. If your garment is LINEN, putting wool strings on it breaks the mixing rule!

Beit Shammai said: “Just skip the tzitzit on linen garments — don’t break the no-mixing rule.”

Beit Hillel said: “No way! The tzitzit rule is so important that it OVERRIDES the no-mixing rule.”

Think of it like… getting permission to break curfew if there’s an emergency. Beit Hillel says tzitzit is that important — it’s an “emergency override.”

The Simple Idea 💡: When two Torah rules clash, one might override the other — Beit Hillel says tzitzit wins.

But Wait — The Rabbis Put on the Brakes! 🛑

Even though Beit Hillel’s view became the official rule, the rabbis later said: “Actually, let’s NOT put wool tzitzit on linen garments in practice.”

Why? That’s what most of the daf is about — trying to figure out their reason!

First Guess: “People are ignorant and will get confused. They’ll see you wearing wool-and-linen and think it’s always okay!”

Response: “We can just teach people the difference!”

Counter-Response: “No, that will make it WORSE — more people will hear about it and get the wrong idea.”

Think of it like… not letting kids play with realistic toy guns in public. People might see it and get the wrong idea, which could cause problems.

The Simple Idea 💡: Sometimes even a permitted act gets restricted because of how it looks to others.

The Fake Blue Dye Problem 🎨

Second Guess: “Maybe the problem is people using FAKE blue dye!”

Real tekhelet (the blue dye for tzitzit) came from a special sea creature and was super expensive. Some people would use cheap indigo plant dye instead, which looks identical but isn’t kosher for the mitzva.

If you used fake blue on a linen garment, you’d have blue strings that don’t count, plus WOOL on LINEN = forbidden mixture with NO mitzva benefit!

Response: “But you could just use LINEN white strings instead of wool — then no mixing problem!”

Think of it like… buying what looks like real maple syrup, but it’s actually corn syrup with coloring. It looks right, but it’s fake — and you can’t always tell the difference.

The Simple Idea 💡: When you can avoid the problem entirely (by using same-type strings), you must.

The Real Reason: Recycled Thread! 🧵

After all those guesses, the Gemara arrives at the REAL reason (from Rava and Rabbi Zeira):

Imagine your linen garment rips near the corner. You sew it up with linen thread — totally fine. Later you think: “I need tzitzit on this corner. I’ll just tie the sewing thread into tzitzit strings!”

Problem: The Torah says you must MAKE the tzitzit — that means CREATE new strings FOR THE PURPOSE of tzitzit. You can’t just repurpose thread that was already there!

Think of it like… your teacher saying “make a birthday card for your friend.” You can’t grab an old card from your drawer and cross out the name. You have to MAKE a new one.

The Simple Idea 💡: Tzitzit strings must be created on purpose for the mitzva — not recycled from old thread.

The Nighttime Problem 🌙

Rav Zeira adds another concern: Tzitzit only apply during the DAY. So if you wear a linen garment with wool strings at NIGHT, you have no mitzva (nighttime = exempt) plus a pure sha’atnez violation!

Think of it like… being allowed to use your mom’s car for school, but if you use it just to joyride at night, that’s not okay. At night, there’s no mitzva “permission,” so the wool-linen mix becomes a plain violation.

The Simple Idea 💡: At night, tzitzit don’t apply — so wool on linen becomes a pure prohibition.

What’s the Garment Made Of? 👕

New question: What if the main BODY of the garment is cloth, but the CORNERS are leather?

Rava says: Look at the main body. If it’s cloth, the garment needs tzitzit. If the main body is leather, exempt — even if the corners are cloth.

Rav Achai disagrees! He says look at the CORNERS.

Think of it like… deciding if a car needs to follow “truck rules” or “car rules.” You look at what MOST of it is — the main body — not just one part.

The Simple Idea 💡: The garment’s “identity” comes from its main body, not its corners.

Don’t Use Old Strings! 🔄

Rav Huna’s Rule: If you attach tzitzit to a 3-cornered garment (which doesn’t need them) and THEN add a 4th corner, those strings DON’T count. When you attached them, the garment didn’t have an obligation yet.

Think of it like… your teacher saying “turn in your homework on Friday.” You can’t hand it in on Monday and say “I’m done!” Tzitzit must be added when the garment NEEDS them.

The Simple Idea 💡: Timing matters — tzitzit must be attached when the obligation exists.

The Adding-Extra Debate ➕

What if you already have tzitzit on all 4 corners, and you add a SECOND set? Rava says that violates “bal tosif” — don’t add to mitzvot. But Rav Pappa objects: “Maybe the person planned to REPLACE the old strings, not ADD to them!”

Think of it like… putting a second toothbrush in the cup — did you “add” toothbrushes, or did you plan to throw out the old one?

The Simple Idea 💡: Adding extra tzitzit might violate “don’t add to mitzvot” — unless you meant to replace.

The Super Simple Summary 🎯

• The Big Problem: What if you need to put wool tzitzit on a LINEN garment? That mixes wool and linen!
• Beit Hillel’s Rule: The tzitzit mitzva OVERRIDES the no-mixing rule — it’s allowed by Torah law
• But the Rabbis Said: Don’t actually do it in practice — too many ways it could go wrong
• Reason #1: People might repurpose sewing thread as tzitzit, which doesn’t count
• Reason #2: At night, tzitzit don’t apply — so wool on linen becomes a pure violation
• Garment Type: What the MAIN BODY is made of determines if you need tzitzit
• Don’t Use Old Strings: Tzitzit must be attached when the garment is OBLIGATED, not before
• Don’t Add Extra: Putting a second set of tzitzit might violate “don’t add to mitzvot”

⚖️ Halacha

Linen Garments and Tzitzit

Source in Daf: 40a, Segments 1-9; 40b, Segments 1-4

Rambam — Hilkhot Tzitzit 3:6

Hebrew:

וּמַה הוּא לַעֲשׂוֹת חוּטֵי צֶמֶר בִּכְסוּת שֶׁל פִּשְׁתָּן אוֹ חוּטֵי פִּשְׁתָּן בִּכְסוּת שֶׁל צֶמֶר אַף עַל פִּי שֶׁהוּא לָבָן לְבַדּוֹ בְּלֹא תְּכֵלֶת. בְּדִין הוּא שֶׁיְּהֵא מֻתָּר שֶׁהַשַּׁעַטְנֵז מֻתָּר לְעִנְיַן צִיצִית… וּמִפְּנֵי מָה אֵין עוֹשִׂין כֵּן. מִפְּנֵי שֶׁאֶפְשָׁר לַעֲשׂוֹת הַלָּבָן שֶׁלָּהּ מִמִּינָהּ. וְכָל מָקוֹם שֶׁאַתָּה מוֹצֵא עֲשֵׂה וְלֹא תַּעֲשֶׂה אִם יָכוֹל אַתָּה לְקַיֵּם אֶת שְׁתֵּיהֶן הֲרֵי מוּטָב.

English:

What is the ruling regarding making woolen strands for a garment of linen or linen strands for a garment of wool even though we are speaking only of the white strands without tekhelet? One might think that it should be permitted, because sha’atnez is permitted to be used for tzitzit… Nevertheless, this is not done. Why? Because it is possible to make the white strands from the same fabric as the garment. Whenever a conflict exists between the observance of a positive commandment and a negative commandment: if it is possible to observe both of them, one should. If not, the observance of the positive commandment supersedes the negative commandment. In the present instance, however, it is possible to observe both of them.

Connection: The Rambam codifies the Gemara’s discussion in 40a, Segments 6-7, applying Reish Lakish’s principle: since one can fulfill tzitzit with same-type strings (linen on linen, wool on wool), there is no justification for overriding the sha’atnez prohibition with cross-type strings.

Rambam — Hilkhot Tzitzit 3:7

Hebrew:

כְּסוּת שֶׁל פִּשְׁתָּן אֵין מַטִּילִין בָּהּ תְּכֵלֶת אֶלָּא עוֹשִׂין הַלָּבָן בִּלְבַד שֶׁל חוּטֵי פִּשְׁתָּן. לֹא מִפְּנֵי שֶׁהַצִּיצִית נִדְחֵית מִפְּנֵי הַשַּׁעַטְנֵז אֶלָּא גְּזֵרָה מִדִּבְרֵיהֶם שֶׁמָּא יִתְכַּסֶּה בָּהּ בַּלַּיְלָה שֶׁאֵינָהּ זְמַן חִיּוּב צִיצִית וְנִמְצָא עוֹבֵר עַל לֹא תַּעֲשֶׂה בְּעֵת שֶׁאֵין שָׁם מִצְוַת עֲשֵׂה.

English:

Tekhelet should not be attached to a linen garment. Rather, one should make the tzitzit from white threads of linen alone. This is not because sha’atnez supersedes tzitzit, but rather it is a Rabbinical decree lest one wear the garment at night, when one is not required to wear tzitzit, and thus violate a negative commandment when the performance of a positive commandment is not involved.

Connection: The Rambam follows Rav Zeira’s reason (40b, Segment 4) as the primary basis for the decree — the concern about nighttime wear. He explicitly states this is a rabbinic restriction, not a Torah-level limitation of tzitzit vis-a-vis sha’atnez.

”Prepare It, and Not from What Has Already Been Prepared”

Source in Daf: 40b, Segments 2-3, 7-11

Rambam — Hilkhot Tzitzit 1:12

Hebrew:

צִיצִית שֶׁעָשָׂה אוֹתוֹ כּוּתִי פָּסוּל… וְצִיצִית שֶׁנַּעֲשָׂה מִן הֶעָשׂוּי מִקֹּדֶם פָּסוּל.

English:

Tzitzit that were made by a gentile are not acceptable… Tzitzit that are made from those already existing are not acceptable.

Connection: This codifies the core principle discussed throughout amud bet — tzitzit must be actively prepared for the mitzva. The Rambam applies this to sewing threads repurposed as tzitzit (40b, Segments 2-3) and to tzitzit attached before the garment was obligated (40b, Segment 7).

Rambam — Hilkhot Tzitzit 1:13

Hebrew:

כֵּיצַד. הֵבִיא כָּנָף שֶׁיֵּשׁ בָּהּ צִיצִית וּתְפָרָהּ עַל הַבֶּגֶד אֲפִלּוּ יֵשׁ בְּאוֹתָהּ הַכָּנָף אַמָּה עַל אַמָּה פָּסוּל… וּמֻתָּר לְהַתִּיר צִיצִית מִבֶּגֶד זֶה וְלִתְלוֹתָם בְּבֶגֶד אַחֵר.

English:

What is implied? Should a person bring the corner of a garment which has tzitzit attached to it and sew it onto another garment, it is not acceptable. Even if that corner of the garment is a square cubit in size… It is permissible to remove strands of tzitzit from one garment and tie them on another.

Connection: The Rambam distinguishes two applications: sewing on a corner with tzitzit already attached is “from what has already been prepared” and invalid, but removing strings and retying them on a new garment is permitted because the act of tying constitutes a new “making.”

Garment with Mixed Materials (Cloth Body and Leather Corners)

Source in Daf: 40b, Segments 5-6

Shulchan Aruch — Orach Chaim 10:4

Hebrew:

טלית של בגד וכנפיה של עור חייבת היא של עור וכנפיה של בגד פטורה.

English:

A tallit made of cloth with corners made of leather requires tzitzit, while one made of leather with corners made of cloth is exempt.

Connection: The Shulchan Aruch codifies Rava’s ruling (40b, Segment 5) directly — the body of the garment determines the obligation, not the corners. Rav Achai’s dissenting view (Segment 6) is not followed.

Nighttime Garment Exemption

Source in Daf: 40b, Segment 4

Shulchan Aruch — Orach Chaim 18:1

Hebrew:

לילה לאו זמן ציצית הוא דאמעיט מוראיתם אותו.

English:

Night is not the time of tzitzit, because the obligation is limited by the verse “and you shall see it” (Numbers 15:39).

Connection: The Shulchan Aruch codifies the principle underlying Rav Zeira’s decree (40b, Segment 4). The Rambam and Rosh disagree about whether the exemption follows the time of wearing or the garment’s designation, and the SA presents both opinions.

Summary of Rulings

🖼️ Visuals

Key Disputes

Sugya Flow

Key Concepts

📚 Tosafot

This daf contains 10 Tosafot entries — 5 on amud aleph and 5 on amud bet.

Amud Aleph (40a)

Tosafot 1: ד”ה סדין בציצית בית שמאי פוטרין

Gemara Context: Segment 1 — The baraita recording the dispute between Beit Shammai and Beit Hillel about whether a linen cloak is obligated in tzitzit.

Hebrew:

פירש בקונטרס דלא דרשינן סמוכין ולא אישתרי כלל כלאים בציצית… לכך פי’ ר”ת דמדאורייתא ב”ש נמי חיובי מחייבי ולא פטרי אלא משום הני טעמי דמפרש בשמעתין ואפילו ממינו נמי פטרי ליה דלמא אתי למיעבד תכלת

Translation:

Rashi explains that [according to Beit Shammai] we do not derive from juxtaposition (semukhin) and therefore sha’atnez is not permitted at all for tzitzit… Therefore Rabbenu Tam explains that by Torah law even Beit Shammai obligate [a linen garment in tzitzit], and they only exempt it because of the reasons explained in our sugya [rabbinic decree], and they exempt even from same-type strings lest one come to use tekhelet.

What Tosafot is Addressing:

Tosafot challenges Rashi’s interpretation that Beit Shammai’s exemption is Torah-level (because they don’t derive the semukhin juxtaposition that would permit sha’atnez for tzitzit). Tosafot raises multiple difficulties with this reading, including that the Gemara in Yevamot establishes that even those who don’t generally derive semukhin do so in Deuteronomy.

Tosafot’s Answer:

Rabbenu Tam offers an alternative explanation: both Beit Shammai and Beit Hillel agree that Torah law obligates linen garments in tzitzit and permits sha’atnez for the mitzva. Beit Shammai’s “exemption” is actually a rabbinic decree — the very reasons discussed in our sugya (indigo fraud, nighttime garments, etc.). They even prohibit same-type strings (linen on linen) out of concern that permitting any tzitzit on linen garments will lead people to use tekhelet (wool), which creates the sha’atnez issue.

Key Insight:

The difference between Rashi and Rabbenu Tam has practical implications: according to Rashi, Beit Shammai’s disagreement is fundamental (about whether sha’atnez is overridden), while according to Rabbenu Tam, the disagreement is about the scope of rabbinic precaution.

Tosafot 2: ד”ה והלכה כדברי בית הלל

Gemara Context: Segment 1 — The concluding statement that the halakha follows Beit Hillel.

Hebrew:

י”ס גורסין אי איכא ציצית של צמר ביום מיכסי ביה ופטור וכי שקעה חמה אי מלביש ליה חייב ומחקו ר”ת כמו שאפרש לקמן

Translation:

Some versions include [an additional passage]: “If there are wool tzitzit on it, during the day one covers himself with it and is exempt [from sha’atnez], and when the sun sets if he puts it on he is liable.” Rabbenu Tam deleted this [text], as I will explain below.

What Tosafot is Addressing:

Some manuscript versions of the Talmud included additional text after “the halakha follows Beit Hillel” that discussed the daytime/nighttime distinction in the context of sha’atnez exemption.

Tosafot’s Answer:

Rabbenu Tam emended this text as spurious, since it doesn’t fit the flow of the sugya. The details are explained later in Tosafot’s comments on the next amud.

Key Insight:

This is a classic example of Tosafot’s text-critical methodology — evaluating variant readings across manuscripts and determining which represent authentic Talmudic text.

Tosafot 3: ד”ה אמר רבי אליעזר ברבי צדוק

Gemara Context: Segment 2 — Rabbi Eliezer ben Rabbi Tzadok’s observation about astonishment in Jerusalem.

Hebrew:

בקונטרס פי’ שני לשונות ולשון שני שפי’ דקאי אב”ש דפטרי… ועוד פי’ דרבי אליעזר אב”ה מהדר דמחייבי ליה והלא בני ירושלים יתמהו עליו

Translation:

Rashi offered two interpretations, and the second interpretation is that [R. Eliezer] is addressing Beit Shammai who exempt… And another interpretation is that Rabbi Eliezer is responding to Beit Hillel who obligate it — [saying] the people of Jerusalem would be astonished at him.

What Tosafot is Addressing:

Tosafot discusses whether Rabbi Eliezer’s comment is directed at Beit Shammai (as a support — “see, even in Jerusalem people were shocked”) or at Beit Hillel (as a challenge — “how can you obligate linen garments when this appears scandalous?”).

Tosafot’s Answer:

Tosafot argues that the second reading (addressing Beit Hillel) fits better with Rabbenu Tam’s approach above: since even Beit Shammai agree the Torah obligates, Rabbi Eliezer is really addressing the practical question of why Jerusalem residents avoided the practice despite the Torah obligation. Rabbi Yehuda HaNasi’s response then explains: the Sages enacted a decree because people were not knowledgeable enough.

Key Insight:

The interpretation of Rabbi Eliezer’s comment depends on the larger framework: if the debate is Torah-level (Rashi), his comment has one direction; if the debate is about rabbinic precaution (Rabbenu Tam), it has another.

Tosafot 4: ד”ה לא יהא אלא לבן / כיון דאפשר במינן

Gemara Context: Segment 6 — The Gemara’s rejection that wool strings could count as white strings on a linen garment.

Hebrew:

לעיל דמסיקנא דחוטי פשתן פוטרין בשל צמר היינו בהדי תכלת דמיגו דתכלת פטר בשל פשתן לבן נמי פטר ואע”ג דאפשר במינו…

Translation:

Above, when we concluded that linen strings exempt a wool garment, that is only together with tekhelet, since through a “migo” — since tekhelet exempts on a linen garment, the white [linen] strings also exempt even though same-type is possible…

What Tosafot is Addressing:

On daf 39b, the Gemara concluded that linen strings can exempt a wool garment. This seems to contradict the principle here that one should always use same-type strings when possible.

Tosafot’s Answer:

That ruling applies only when tekhelet is also present. Through a “migo” (since tekhelet — which is wool — is already creating sha’atnez on the linen garment, the white linen strings can also participate). Alternatively, from a Torah perspective sha’atnez was genuinely permitted for tzitzit, and the restriction to same-type strings is only rabbinic. The Gemara’s conclusion on 39b applies at the Torah level.

Key Insight:

The concept of “migo” (piggybacking) — once sha’atnez is already overridden for one purpose, additional cross-type strings can ride along with it.

Tosafot 5: ד”ה וליבדקיה

Gemara Context: Segment 8 — The suggestion to test whether the dye is genuine tekhelet.

Hebrew:

פי’ בקונטרס שתי לשונות לשון אחד ליבדוק כל יורות הצובעים ומשני משום טעימה… ל”א ועיקר וליבדקיה כדאיתא לקמן דמייתי גילתא ושבלילתא ובדקינן ליה…

Translation:

Rashi offered two interpretations: One — test all the dyers’ vats, and the answer is because of te’ima (testing dye), which was done not for the mitzva’s sake… The second and primary interpretation: test it as explained later (42b) by bringing certain chemicals and checking whether the tzitzit dye is tekhelet or kala ilan…

What Tosafot is Addressing:

Tosafot clarifies the two possible meanings of “testing” — checking the production process versus chemically testing the finished product.

Tosafot’s Answer:

The primary meaning is the chemical test described later on 42b. The answer of “te’ima” then means that some of the dye may have been used as a sample batch to test the vat’s color — this is undetectable by any chemical test, since the dye is genuine tekhelet but was produced for testing purposes rather than for the mitzva.

Key Insight:

The te’ima problem is about intent (lishmah), not substance — genuine tekhelet that was produced for the wrong purpose cannot be detected through any physical test.

Amud Bet (40b)

Tosafot 6: ד”ה שמא יקרע סדינו בתוך שלש

Gemara Context: Segment 2 — Rava’s explanation that the decree is due to the concern about sewing a torn cloak.

Hebrew:

פי’ בקונטרס בתוך שלש לכנף וכשיתפרנו בחוטי פשתן יניח סוף החוטין תלויין שם לציצית והוה ליה תעשה ולא מן העשוי… מיהו הוה ליה למינקט משום דבעינן טוויה או תלייה לשמה

Translation:

Rashi explains: within three [fingerbreadths] of the corner, and when he sews it with linen threads he will leave the end of the threads hanging there for tzitzit, which would be “from what has already been prepared”… However, one could have said the reason is because we require spinning or hanging for the sake [of the mitzva].

What Tosafot is Addressing:

Tosafot examines Rashi’s explanation of “within three fingerbreadths” — whether it means three fingerbreadths from the corner edge or three fingerbreadths of the corner piece itself — and whether the problem is truly תעשה ולא מן העשוי or a different issue of lishmah.

Tosafot’s Answer:

Tosafot suggests that the core problem may actually be that the sewing thread was not spun or attached with the intent for tzitzit (lishmah), rather than the “already prepared” principle. Furthermore, Tosafot clarifies that “within three” means the corner piece ripped and less than three fingerbreadths remain — which means the attachment is halakhically severed, and repairs cannot make it a valid connection.

Key Insight:

The distinction between תעשה ולא מן העשוי (wrong sequence) and lishmah (wrong intent) matters for determining which cases are invalidated.

Tosafot 7: ד”ה ר’ זירא אמר / משום כסות לילה

Gemara Context: Segment 4 — Rav Zeira’s additional reason for the decree: concern about nighttime garments.

Hebrew:

ר”ת פי’ דכן עיקר כדאיתא פ’ במה מדליקין… מתוך כך יש להוכיח מכאן דהלכה כר’ שמעון דלילה לאו זמן ציצית היא

Translation:

Rabbenu Tam explains that this is the primary reason, as found in the chapter “Bameh Madlikin” (Shabbat 25b)… From this we can prove that the halakha follows Rabbi Shimon that nighttime is not the time for tzitzit.

What Tosafot is Addressing:

Tosafot addresses two issues: (1) the distinction between Rav Zeira and Rabbi Zeira (different individuals), and (2) whether the halakha follows the view that nighttime is exempt from tzitzit.

Tosafot’s Answer:

Rabbenu Tam marshals multiple proofs that the halakha follows Rabbi Shimon’s view that nighttime is not the time for tzitzit: the anonymous Gemara in Shabbat 25b, the Gemara in Berakhot about not reciting the tzitzit passage at night, and the stam Gemara in Zevachim. He further explains that even a daytime garment worn at night is exempt according to the Rambam’s approach, while according to the Rosh, a garment designated for daytime use remains obligated even at night. Tosafot also clarifies that the Torah’s blanket permission for sha’atnez in tzitzit means it is permitted even at night and even for women — the decree is rabbinic, not reflecting an inherent limitation.

Key Insight:

The determination that night is exempt from tzitzit has direct practical implications: it is the foundation for the Rambam’s ruling that tekhelet should not be placed on linen garments.

Tosafot 8: ד”ה והאמר רבי זירא הטיל למוטלת כשרה

Gemara Context: Segment 9 — The challenge from Rabbi Zeira’s ruling that adding tzitzit to a garment that already has them is valid.

Hebrew:

תימה היכי ס”ד דרבי זירא לית ליה תעשה ולא מן העשוי הא ר’ זירא גופיה אית ליה לעיל וי”ל דס”ד כיון דתחילת הנחתן לשם מצוה לא שייך ביה תעשה ולא מן העשוי…

Translation:

It is difficult: how could we think that Rabbi Zeira does not hold the principle of “prepare it and not from what has already been prepared” — Rabbi Zeira himself relies on it above! One can answer that we might have thought: since the initial placement was for the sake of the mitzva, the principle of “not from what has already been prepared” does not apply…

What Tosafot is Addressing:

The Gemara seems to suggest that Rabbi Zeira might not accept the principle of תעשה ולא מן העשוי — but he himself used this very principle earlier in the sugya as the basis for invalidating sewing-thread tzitzit!

Tosafot’s Answer:

The challenge is not whether Rabbi Zeira accepts the principle generally — he clearly does. Rather, the question is whether it applies in this specific case: when the second set of strings was attached with the intent for a mitzva (unlike sewing threads, which had no mitzva intent at all). One might argue that since the second set was placed lishmah (for the sake of the mitzva), even though it was superfluous at the time, it should not be disqualified by the “already prepared” principle. Above, when the corner tore and threads were used for sewing, the original placement was definitively not for the mitzva.

Key Insight:

The principle of תעשה ולא מן העשוי applies differently depending on whether the original attachment had mitzva intent or not.

Tosafot 9: ד”ה בבל תוסיף קאי מעשה לא הוי

Gemara Context: Segment 10 — Rava’s resolution that adding a second set triggers the prohibition of bal tosif, which constitutes a valid “action.”

Hebrew:

דכיון דעביד איסורא לא חשיב עשייה ובשעת קציצת הראשונים זו היא עשייתן ולא דמי לההיא דפ’ קמא דסוכה…

Translation:

Since he performs a prohibition [bal tosif], it is not considered a valid “making” [of tzitzit]. Rather, at the time of cutting the first set — that is when the second set becomes validly “made.” This is unlike the case in the first chapter of Sukkah…

What Tosafot is Addressing:

Tosafot examines Rava’s reasoning: how does violating bal tosif transform an otherwise meaningless act into a valid “making”?

Tosafot’s Answer:

The logic is counterintuitive: the very fact that adding a second set triggers a prohibition (bal tosif) means the act has halakhic significance. When the first set is subsequently removed, the second set’s existence becomes halakhically operative — the moment of removal retroactively validates the second set as the “active” tzitzit. The “making” occurs at the point of cutting, not at the point of attachment.

Key Insight:

Halakhic “actions” are defined by their legal significance, not merely their physical nature — an act that triggers a prohibition is still a legally cognizable act.

Tosafot 10: ד”ה ממאי דגברא לאוסופי קמיכוין

Gemara Context: Segment 11 — Rav Pappa’s objection: perhaps the person intended to nullify, not add.

Hebrew:

אפילו למאן דאמר בפ’ בתרא דעירובין דלעבור משום בל תוסיף לא בעי כוונה… מ”מ הכא מודה דליכא בל תוסיף כיון דלבטולי קמיכוין

Translation:

Even according to the one who says in the last chapter of Eruvin that to violate bal tosif one does not need intent… nevertheless, here he concedes that there is no bal tosif since his intent is to nullify [the first set].

What Tosafot is Addressing:

There is a broader debate about whether the prohibition of bal tosif (adding to mitzvot) requires intentional addition. Some authorities in Eruvin hold that even unintentional addition violates bal tosif. If so, Rav Pappa’s argument seems weak — even if the person intends to nullify, he still violates bal tosif!

Tosafot’s Answer:

Even the authority who says bal tosif does not require specific intent concedes that intent to nullify exempts. When someone explicitly plans to replace the first set, the simultaneous existence of two sets is a transitional state, not an addition. The person never intends to have five sets — he intends to swap one for another. This case is fundamentally different from unintentionally performing an extra lulav shake or blowing an extra shofar blast.

Key Insight:

Intent to replace versus intent to supplement creates a critical distinction in the application of bal tosif — the prohibition targets augmentation, not replacement.

Tosafot 11: ד”ה תכלת אין בה משום כלאים ואפילו בטלית פטורה

Gemara Context: Segment 12 — Shmuel’s ruling that tzitzit strings are exempt from kilayim even on an exempt garment.

Hebrew:

מדקאמר ואפילו ולא קאמר אפי’ בלא וי”ו משמע דבלא טלית פטורה איצטריך לאשמועינן דתכלת אין בה משום כלאים… ואור”ת דהכא נמי אשמעינן דאפילו בלילה אין בה משום כלאים

Translation:

From the fact that he says “and even” (with a vav) and not just “even” (without a vav), it implies that even without the “exempt garment” clause, the first part [that tekhelet has no kilayim issue] was necessary to teach… And Rabbenu Tam says that here too it teaches us that even at night there is no kilayim prohibition.

What Tosafot is Addressing:

Tosafot analyzes the precise language of Shmuel’s statement, noting that the word ואפילו (with the conjunctive vav) indicates two distinct teachings, not just one.

Tosafot’s Answer:

The statement teaches two things: (1) tzitzit strings are inherently exempt from kilayim — this applies even at night when there is no mitzva obligation, because the Torah’s blanket permission for sha’atnez in tzitzit is absolute, not contingent; (2) this exemption extends even to a garment that is otherwise exempt from tzitzit. Rabbenu Tam concludes that the kilayim exemption for tzitzit is comprehensive — it applies at all times, to all people (including women), and even on borrowed garments (for the first 30 days). The rabbinic decree to avoid tekhelet on linen garments is an extra precaution, not a reflection of any Torah-level limitation.

Key Insight:

The Torah’s permission for sha’atnez in tzitzit is absolute and unconditional — the rabbinic restrictions are extra-legal precautions, not inherent limits on the mitzva.