יבמות ה׳Yevamot 5

Mishnah 3ג׳

נָתַן גֵּט וְעָשָׂה מַאֲמָר, צְרִיכָה גֵט וַחֲלִיצָה. נָתַן גֵּט וּבָעַל, צְרִיכָה גֵט וַחֲלִיצָה. נָתַן גֵּט וְחָלַץ, אֵין אַחַר חֲלִיצָה כְלוּם. חָלַץ וְעָשָׂה מַאֲמָר, נָתַן גֵּט, וּבָעַל, אוֹ בָעַל וְעָשָׂה מַאֲמָר, נָתַן גֵּט וְחָלַץ, אֵין אַחַר חֲלִיצָה כְלוּם. אַחַת יְבָמָה אַחַת לְיָבָם אֶחָד, וְאַחַת שְׁתֵּי יְבָמוֹת לְיָבָם אֶחָד:

If he gave a get and made a ma'amar, she requires a get and chalitzah. [For the get pushes away (the linkage) a little and leaves over a little, and the ma'amar acquires what the get has left over. Therefore, she requires a get for his ma'amar and chalitzah for his (yibum) linkage.] If he gave a get and cohabited with her, she requires a get and chalitzah. [He may not remain with her, for from the time he gave her the get, "who would not build" obtains, so that she requires a get for his cohabitation and chalitzah for his linkage.] If he gave her a get and chalitzah, there is nothing after chalitzah. [This Mishnah is in accordance with R. Akiva, who says that betrothal does not obtain with those interdicted by negative commandment. But this is not the halachah. The halachah is in accordance with the sages, who say that there is something after chalitzah, so that if he betroths her after chalitzah, she requires a get from him.] If he gave her chalitzah and made a ma'amar, or (if he gave her chalitzah and then) gave her a get or cohabited with her, or if he cohabited with her and gave her a ma'amar, or (if he cohabited with her) and then he gave her a get or chalitzah — there is nothing after chalitzah. This is so both in the instance of one yevamah to one yavam and in the instance of two yevamoth to one yavam. [They are the same in that there is something after the first get or after the first ma'amar; and there is nothing after initial cohabitation or after chalitzah.]

Mishnah 4ד׳

כֵּיצַד. עָשָׂה מַאֲמָר בָּזוֹ וּמַאֲמָר בָּזוֹ, צְרִיכוֹת שְׁנֵי גִטִּין וַחֲלִיצָה. מַאֲמָר בָּזוֹ וְגֵט בָּזוֹ, צְרִיכָה גֵט וַחֲלִיצָה. מַאֲמָר בָּזוֹ וּבָעַל אֶת זוֹ, צְרִיכוֹת שְׁנֵי גִטִּין וַחֲלִיצָה. מַאֲמָר בָּזוֹ וְחָלַץ לָזוֹ, הָרִאשׁוֹנָה צְרִיכָה גֵט. גֵּט לָזוֹ וְגֵט לָזוֹ, צְרִיכוֹת הֵימֶנּוּ חֲלִיצָה. גֵּט לָזוֹ וּבָעַל אֶת זוֹ, צְרִיכָה גֵט וַחֲלִיצָה. גֵּט לָזוֹ וּמַאֲמָר בָּזוֹ, צְרִיכָה גֵט וַחֲלִיצָה. גֵּט לָזוֹ וְחָלַץ לָזוֹ, אֵין אַחַר חֲלִיצָה כְּלוּם:

How? [i.e., What is the halachah?] If he made a ma'amar in one, two gittin are required [for the two yevamoth, according to the rabbis, there being a ma'amar after a ma'amar], and chalitzah [for one of them, who exempts her tzarah.] If he made a ma'amar in one and gave a get to the other, a get and chalitzah are required. [The get of the latter invalidates the ma'amar of the former, "who would not build" obtaining, so that a get is required for his ma'amar and chalitzah for his linkage.] If he gave a ma'amar to one and cohabited with the other, two gittin are required, [a get for his ma'amar and a get for his cohabitation], and chalitzah [to one of them, who exempts her tzarah.] If he gave a ma'amar to one and chalitzah to the other, the first requires a get. If he gave a get to one and a get to the other, chalitzah (to one of them) is required. If he gave a get to one and cohabited with the other, a get and chalitzah are required. And he is forbidden to keep her, ["who would not build" obtaining because of the get of the first. And a get does not suffice for the one he cohabited with, it being an unfit cohabitation. If he gave a get to one and a ma'amar to the other, a get and chalitzah are required. If he gave a get to one and chalitzah to the other, there is nothing after chalitzah. [And if he then betroths her or her tzarah, the betrothal does not "take," as per R. Akiva, who holds that betrothal does not obtain with those interdicted by negative commandment. And this is not the halachah.]