סוטה ב׳:ה׳ - ב׳:ו׳

אמן שלא שטיתי ארוסה ונשואה – through the rule permitting the court to insert in an oath an affirmation to which the person concerned could not have been compelled directly, he places the burden upon her unchastity while betrothed and even though he did not have regarding him warnings of jealousy (given to the suspected wife) and a married woman’s retirement with a man under suspicious circumstances. And from here, this insertion of an oath to which a person could not have been compelled to take directly is from the Torah.

שומרת יבם וכנוסה – if she was his sister-in-law (i.e., the widow of his brother who died without issue) and he brought her into a levirate marriage and he was jealous of her and she retired with a man under suspicious circumstances, he inserts a claim of ritual impurity which she could not have been compelled to take directly that she had become defiled while she was awaiting levirate marriage . And our Mishnah is according to Rabbi Akiva who said that a woman awaiting levirate marriage is unchastity–lewdness, but it is not the Halakha but rather a woman awaiting levirate marriage who ran about as a prostitute is permitted to the levir. Therefore, he does not make this condition upon her if she was unchaste as a woman awaiting levirate marriage.

אמן שלא נטמאתי וכו' – My explanation is made for the “Amen” on the imprecation, “Amen” on the oath, as we taught above (in this Mishnah). And this is what it said: “Amen” that I did not become ritually impure – that is the “Amen” on the oath that the Kohen imposed upon her: “I impose upon you the oath that you did not become ritually impure.

ואם נטמאתי יבואו בי – and if I become I became defiled, it should come upon me,” meaning the acceptance of the imprecation that the Kohen related to her and if you were ritually defiled, all of these curses will come upon you.

אמן שלא אטמא – that if you become ritually impure afterwards, the water will contest her, but the Halakha is not according to Rabbi Meir.

ולא משנתגרשה – for if she ran about as a prostitute–was unchaste after she was divorced, and he retracted [from his decision to divorce her] and restored her [as his wife] and he was jealous of her, and she retired with a man under suspicious circumstances, the [bitter] waters do not examine her on prostitution that is after divorce, for the divorced woman who engaged in prostitution is permitted to return to her husband, for the All-Merciful (i.e., God) suspended [the prohibition] on Kiddushin–betrothal, [not] on intercourse, as it is written (Deuteronomy 24:2): “She leaves his household and becomes the wife of another man.” Therefore, when she was betrothe to another man, even though she had not had sexual intimacy, she is prohibited to return to her husband, but if she had sexual intercourse without Kiddushin–betrothal, she is permitted to return to her husband.