אֶלָּא אָמַר רַבִּי אֶלְעָזָר: אָתְיָא ״אוֹת״ ״אוֹת״. אֶלָּא מֵעַתָּה תְּפִילִּין דִּכְתִיב בְּהוּ ״אוֹת״, לִידְחֵי שַׁבָּת אֶלָּא אָתְיָא ״בְּרִית״ ״בְּרִית״. גָּדוֹל, דִּכְתִיב בֵּיהּ ״בְּרִית״, לִידְחֵי שַׁבָּת! אֶלָּא אָתְיָא ״דּוֹרוֹת״ ״דּוֹרוֹת״. צִיצִית דִּכְתִיב בֵּיהּ ״דּוֹרוֹת״ לִידְחֵי שַׁבָּת! אֶלָּא אָמַר רַב נַחְמָן בַּר יִצְחָק: דָּנִין ״אוֹת״ ״בְּרִית״ וְ״דוֹרוֹת״ מֵ״אוֹת״ ״בְּרִית״ וְ״דוֹרוֹת״ — לְאַפּוֹקֵי הָנָךְ, דְּחַד חַד הוּא דִּכְתִיב בָּהֶן.
Rather, Rabbi Elazar said: This halakha is derived by means of a verbal analogy between the word sign that appears with regard to circumcision: “And you shall be circumcised in the flesh of your foreskin; and it shall be a sign of the covenant between Me and you” (Genesis 17:11), and sign that appears with regard to Shabbat: “However, you shall keep My Shabbatot, for it is a sign between Me and you throughout your generations” (Exodus 31:13). From this verbal analogy, it is derived that circumcision, which is a sign, may be performed even on Shabbat, which is itself a sign. The Gemara asks: But if what you say is so, phylacteries, with regard to which the term sign is also written: “And it shall be for a sign on your hand and for frontlets between your eyes” (Exodus 13:16), should also override Shabbat, and they should be donned on that day. Rather, this principle is derived by means of a different verbal analogy from the word covenant that appears with regard to circumcision: “And you shall be circumcised in the flesh of your foreskin; and it shall be a sign of the covenant between Me and you” (Genesis 17:11), and the word covenant that appears with regard to Shabbat: “The children of Israel shall keep the Shabbat, to observe the Shabbat throughout their generations for a perpetual covenant” (Exodus 31:16). The Gemara raises a difficulty: If this is so, then the circumcision of an adult should also be permitted on Shabbat and it should not be limited to a child on the eighth day, as the term covenant is written with regard to him as well, as it applies to any Jewish male not yet circumcised. Therefore, let his circumcision override Shabbat. The halakha, however, is that only circumcision at its proper time on the eighth day overrides Shabbat. Rather, this halakha is derived by means of a verbal analogy between the word generations that appears with regard to Shabbat: “Throughout their generations for a perpetual covenant” (Exodus 31:16), and the word generations that appears with regard to circumcision: “And I shall establish My covenant between Me and you, and between your seed after you throughout their generations, for an everlasting covenant” (Genesis 17:7). The Gemara asks: If so, let ritual fringes too, with regard to which the term generations is also written, override Shabbat, and it should be permitted to affix ritual fringes to a garment on Shabbat. Rather, Rav Naḥman bar Yitzḥak said: This halakha is derived not from one common word alone, but one derives it based upon the three words sign, covenant, and generations that appear with regard to circumcision, from sign, covenant, and generations that appear with regard to Shabbat, to the exclusion of these, i.e., ritual fringes and phylacteries, that with regard to each of them, one of these is written but not all three words together.