The Mishnah
גיטין ד׳Gittin 4
Perek 4 of 9 in Gittin — 9 mishnayot
Mishnah 1א׳
הַשּׁוֹלֵחַ גֵּט לְאִשְׁתּוֹ וְהִגִּיעַ בַּשָּׁלִיחַ, אוֹ שֶׁשָּׁלַח אַחֲרָיו שָׁלִיחַ וְאָמַר לוֹ, גֵּט שֶׁנָּתַתִּי לְךָ בָּטֵל הוּא, הֲרֵי זֶה בָטֵל. קָדַם אֵצֶל אִשְׁתּוֹ אוֹ שֶׁשָּׁלַח אֶצְלָהּ שָׁלִיחַ וְאָמַר לָהּ, גֵּט שֶׁשָּׁלַחְתִּי לִיךְ בָּטֵל הוּא, הֲרֵי זֶה בָטֵל. אִם מִשֶּׁהִגִּיעַ גֵּט לְיָדָהּ, שׁוּב אֵינוֹ יָכוֹל לְבַטְּלוֹ:
[With regard to] one who sends a bill of divorce to his wife [via a messenger], and then catches up with the messenger, or sent [another] messenger after the first, and said, "The bill of divorce that I gave to you is cancelled," then it is cancelled. If the husband preceded the messenger [in getting] to the woman, or if he sent [a second] messenger, and he said to her, "The bill of divorce that I sent you is cancelled," then it is cancelled. If [he makes this statement] from, [i.e., after,] the moment that the bill of divorce reached her hands, he can no longer cancel it.
Mishnah 2ב׳
בָּרִאשׁוֹנָה הָיָה עוֹשֶׂה בֵית דִּין בְּמָקוֹם אַחֵר וּמְבַטְּלוֹ. הִתְקִין רַבָּן גַּמְלִיאֵל הַזָּקֵן שֶׁלֹּא יְהוּ עוֹשִׂין כֵּן, מִפְּנֵי תִקּוּן הָעוֹלָם. בָּרִאשׁוֹנָה הָיָה מְשַׁנֶּה שְׁמוֹ וּשְׁמָהּ, שֵׁם עִירוֹ וְשֵׁם עִירָהּ. וְהִתְקִין רַבָּן גַּמְלִיאֵל הַזָּקֵן שֶׁיְּהֵא כוֹתֵב, אִישׁ פְּלוֹנִי וְכָל שֵׁם שֶׁיֵּשׁ לוֹ, אִשָּׁה פְלוֹנִית וְכָל שׁוּם שֶׁיֵּשׁ לָהּ, מִפְּנֵי תִקּוּן הָעוֹלָם:
At first, a man [who had already sent his wife a bill of divorce by means of a messenger] would set up a religious court in a different place [from where the wife lived] and cancel [the bill of divorce]. Rabban Gamliel the Elder enacted that they not be able to do this, due to [the need for] repairing the world [Tikkun HaOlam]. At first, a man could change his name and her name, the name of his city, or the name of her city. Rabban Gamliel the Elder enacted that one would write: "The man, So-and-so, and any other name that he has, and the woman, So-and-so, and any other name that she has," due to Tikkun HaOlam.
Mishnah, Torat Emet 357 edition, via Sefaria — public domain
English: Sefaria Community Translation — CC0