Rabban Gamliel says: There is no [validity to] a bill of divorce after a bill of divorce, nor [to] maamar after maamar, nor [to] cohabitation after cohabitation, nor [to] chalitzah after chalitzah. The Sages [however] say: There is [validity to] a bill of divorce after a bill of divorce, and [to] maamar after maamar; but after cohabitation or after chalitzah there is nothing.

How so? [If] he performed maamar with his yevamah and then gave her a bill of divorce, she requires chalitzah from him. [If] he performed maamar [with her] and then chalitzah, she requires a bill of divorce from him. [If] he performed maamar and then cohabited [with her], he has done it properly.

[If] he gave [her] a bill of divorce and then maa-mar, she requires a bill of divorce and chali- tzah. [If] he gave [her] a bill of divorce and then cohabited [with her], she requires a bill of divorce and chalitzah. [If] he gave [her] a bill of divorce and then chalitzah, there is nothing after chalitzah.  [If] he performed chalitzah [with her] —- and then performed maamar [with her], or gave [her] a bill of divorce, or cohabited [with her]; or if he cohabited [with her] and then performed maamar, or gave [her] a bill of divorce, or performed chalitzah [with her] —- there is nothing after chalitzah. It is the same whether [it is] one yevamah with one yavam, or two yevamos with one yavam.

How so? [If] he performed maamar with one and [then] maamar with the other, they require two bill of divorce and chalitzah; maamar with one and [then] a bill of divorce to the other, she requires a bill of divorce and chalitzah; maamar with one and [then] he cohabited with the other, they require two bills of divorce and chalitzah; maamar with one and [then] he performed chalitzah with the other, the first one requires a bill of divorce.  [If he gave] a bill of divorce to one and [then] a bill of divorce to the other, they require chalitzah from him; a bill of divorce to one and [then] he cohabited with the other, she requires a bill of divorce and chalitzah; a bill of divorce to one and [then] maamar with the other, she requires a bill of divorce and chalitzah; a bill of divorce to one and [then] chalitzah to the other —- there is nothing after chalitzah.

[If] he performed chalitzah and [then] performed chalitzah, or he performed chali- tzah and [then] maamar, [or] gave a bill of divorce or cohabited; or [if] he cohabited and [then] cohabited, or he cohabited and [then] performed maamar, [or] gave a bill of divorce or performed chalitzah —- there is nothing after chalitzah. It is the same whether [it was] one yavam with two yevamos, or two yevamim with one yevamah.

. [If] he performed chalitzah and [then] per-formed maamar, or gave a bill of divorce, or cohabited; or [if] he cohabited and [then] per- formed maamar, or gave a bill of divorce, or performed chalitzah —- there is nothing after cha- litzah —- whether at the beginning or in the middle or at the end. However, [in the case of] cohabitation —- when it is at the beginning there is nothing after it; but [when it is] in the middle or at the end, there is something after it. R' Nechemiah says: Whether [it is] cohabitation or chalitzah, [and] whether [it is] at the beginning, in the middle, or at the end —- there is nothing after it.

One who cohabits with his yevamah —- whether mistakenly or wantonly, whether coerced or willingly; even if he was mistaken and she was wanton, [or] he was wanton and she was mistaken; [or] he was coerced but she was not, [or] she was coerced but he was not; whether the union was [only] partial or complete —- he has acquired [her]. There is no distinction between the forms of cohabitation.

Similarly, [if] one cohabits with [any] one of the arayos [forbidden] in the Torah, or those disqualified [from marriage] —- for example, a widow to a Kohen Gadol, a divorcee or chalutzah to an ordinary Kohen, a mamzeress or Nesinite to a Yisrael, or the daughter of a Yisrael to a mamzer or Nesinite —- he has disqualified [her]. There is no distinction between the forms of cohabitation.

A widow [who was married] to a Kohen Gadol, [or] a divorcee or chalutzah [who was married] to an ordinary Kohen —- [even if they were only] betrothed, they may not eat terumah; R' Elazar and R' Shimon [however] validate [it]. [If] they were widowed or divorced —- [if it was] from marriage, they are disqualified; [but if] from betrothal, they are qualified.

A Kohen Gadol may not marry a widow, neither a widow from betrothal nor a widow from marriage. And he may not marry a bogeres; R' Elazar and R' Shimon [however] validate [marriage] with a bogeres. He may not marry the victim of a blow.  [If] he betrothed a widow and was [then] appointed Kohen Gadol, he may marry [her]. It happened that Yehoshua ben Gamla betrothed Marsa, the daughter of Baisos, and the king [then] appointed him to be Kohen Gadol, and he married her.  [If] a widow awaiting her yavam fell to an ordinary Kohen, and he was [then] appointed to be Kohen Gadol, even if he [had already] performed maamar with her, he may not marry [her]. [If] a Kohen Gadol's brother died, he performs chalitzah, but not yibum.

An ordinary Kohen may not marry an ailonis, unless he has a wife or children. R' Yehudah says: Even if he has a wife or children he may not marry an ailonis, because she is the zonah mentioned in the Torah. The Sages, however, say: Zonah refers only to a female convert, or a freed slavewoman, or one who engaged in a forbidden cohabitation.

A man may not refrain from [the mitzvah of] being fruitful and multiplying, unless he has children —- Beis Shammai say: Two males; but Beis Hillel say: A male and a female, as it is stated (Genesis 5:2): “He created them male and female.”  One who married a woman and remained with her ten years, but she did not bear children, is not permitted to refrain [from the fulfilling the mitzvah]. [If] he divorced her, she may marry another, and the second one may remain with her for ten years. If she miscarried, he counts from the time of her miscarriage.  The man is commanded to be fruitful and multiply, but not the woman. R' Yochanan ben Beroka says: Concerning both of them it is stated (Genesis 1:28): “And God blessed them and said to them be fruitful and multiply.”