Rabban Gamaliel says: There is no [validity] to a get given after a get, nor to a ma’amar after a ma’amar, nor to an act of sexual intercourse after another act of sexual intercourse, nor to a halitzah after another halitzah. However, the Sages say: There is [validity] to a get given after a get, and to a ma’amar after a ma’amar but not to an act of sexual intercourse after another act of sexual intercourse, or to a halitzah after another halitzah.

How [is the release from yibbum effected]?If he performed ma'amar for his yevamah and gave her a get, she requires halitzah. If he performed ma'amar and and did halizah, she requires a get. If he performed ma’amar and then had intercourse with her, behold this is in accordance with the commandment.

If the yavam gave her a get and then ma’amar, she needs [another] get and halitzah. If he gave her a get and then had intercourse with her, she needs [another] get and halitzah. If he gave her a get and then did halitzah, there is nothing after halitzah. If the yavam did halitzah and then he did ma’amar or gave her a get, or had intercourse with her; Or if he had intercourse with her and then did ma’amar, or gave her a get, or did halitzah, there is nothing after halitzah. [And the law is the same] whether there is one yevamah to one yavam or two yevamoth to one yavam.

How is this so?If the yavam did ma'amar with this one and ma'amar with the other one, they need two letters of divorce and [one of them must have] halizah. If he did ma'amar with one and gave a get to the other, the [first one] needs a get and [one of them must have] halitzah. If he did ma'amar with one and had intercourse with the other, they need two gets and [one of them must have] halitzah. If he had ma'amar with one and gave halitzah to the other, the first needs a get. If he gave a get to one and a get to the other, [one of them] requires halitzah. If he gave a get to one and had intercourse with the other, [the second one] requires a get and [one of them must have] halitzah. [If he gave] a get to one and had ma'amar with the other, [the second] requires a get and [one of them must have] halitzah. [If he gave] a get to one and halizah to the other, there is nothing after halitzah.

If he performed halitzah [for one] and then performed halitzah [for the other], Or performed halitzah [for one] and did ma'amar [with the other], or gave her get, or had intercourse with her; Or if he had intercourse [with one] and then with the other, Or had intercourse [with one] and then ma'amar with the other, or gave her a get, or performed halitzah there is nothing after halitzah. [There is no difference in the law] whether there was one yavam to two yevamoth or two yavamim to yevamah.