Mishnayos Gittin Perek 3 Mishnah 1

Any bill of divorce that was not written for the sake of a specific woman is invalid. How so? In a case of a man who was passing through the marketplace and heard the sound of scribes who write bills of divorce dictating the text to their students: The man so-and-so divorces so-and-so from the place of such and such; and the man said: This is my name and that is the name of my wife, and he wishes to use this bill for his divorce, this bill is unfit for him to divorce his wife with it, as it was not written for the sake of any woman. Moreover, if one wrote a bill of divorce with which to divorce his wife but later reconsidered, and a resident of his town found him and said to him: My name is the same as your name, and my wife’s name is the same as your wife’s name, and we reside in the same town; give me the bill of divorce and I will use it; the bill of divorce is unfit for the second man to divorce his wife with it. Moreover, if one had two wives and their names were identical, and he wrote a bill of divorce to divorce the older one and then reconsidered, he may not divorce the younger one with it. Moreover, if he said to the scribe: Write a bill of divorce for whichever one of them that I will want and I will divorce her with it, this bill of divorce is unfit for him to divorce either wife with it.

כָּל גֵּט שֶׁנִּכְתַּב שֶׁלֹּא לְשׁוּם אִשָּׁה, פָּסוּל. כֵּיצַד. הָיָה עוֹבֵר בַּשּׁוּק וְשָׁמַע קוֹל סוֹפְרִים מַקְרִין, אִישׁ פְּלוֹנִי מְגָרֵשׁ אֶת פְּלוֹנִית מִמָּקוֹם פְּלוֹנִי, וְאָמַר, זֶה שְּׁמִי וְזֶה שֵּׁם אִשְׁתִּי, פָּסוּל לְגָרֵשׁ בּוֹ. יָתֵר מִכֵּן, כָּתַב לְגָרֵשׁ בּוֹ אֶת אִשְׁתּוֹ וְנִמְלַךְ, מְצָאוֹ בֶן עִירוֹ וְאָמַר לוֹ, שְׁמִי כִשְׁמֶךָ וְשֵׁם אִשְׁתִּי כְשֵׁם אִשְׁתֶּךָ, פָּסוּל לְגָרֵשׁ בּוֹ. יָתֵר מִכֵּן, הָיוּ לוֹ שְׁתֵּי נָשִׁים וּשְׁמוֹתֵיהֶן שָׁווֹת, כָּתַב לְגָרֵשׁ בּוֹ אֶת הַגְּדוֹלָה, לֹא יְגָרֵשׁ בּוֹ אֶת הַקְּטַנָּה. יָתֵר מִכֵּן, אָמַר לַלַּבְלָר, כְּתֹב לְאֵיזוֹ שֶׁאֶרְצֶה אֲגָרֵשׁ, פָּסוּל לְגָרֵשׁ בּוֹ: