Ketubot 24A

אימא לא.

say no, his claim is not accepted.

ואי אשמעינן הני תרתי, משום דממונא, אבל אשת איש, דאיסורא ⁠— אימא לא.

And if the tanna taught us these two cases, one might have thought that the claim is deemed credible due to the fact that the cases involve monetary matters; however, in the case of a married woman who claims that she was divorced, which is a ritual matter, say no, she is not deemed credible. Therefore, it was necessary for the tanna to teach us all 3 cases.

״נשביתי וטהורה אני״ למה לי? משום דקא בעי למיתני: ״ואם משנשאת באו עדים ⁠— הרי זו לא תצא״.

The Talmud asks: With regard to the case where one says: I was taken captive and I am pure, why do I need the tanna to teach that case? There is no novel element in that ruling, as it is merely another application of the same principle. The Talmud answers: The tanna taught that case due to the fact that the tanna sought to teach based on it: And if the witnesses came after she married, this woman need not leave her husband.

הניחא למאן דמתני לה אסיפא, אלא למאן דמתני לה ארישא ⁠— מאי איכא למימר? משום דקא בעי למיתני: ״שתי נשים שנשבו״.

The Talmud asks: This works out well according to the one who teaches this halakha in reference to the latter clause of the Mishnah with regard to a woman taken captive. However, according to the one who taught this halakha in reference to the first clause of the Mishnah, with regard to a woman who claimed that she was married and divorced, what is there to say? According to that opinion, the ruling with regard to a woman taken captive who claims that she remained pure is superfluous. If a woman is deemed credible in the case where the concern is that she is a married woman, she is all the more so deemed credible when the concern pertains to a less severe prohibition, that of a woman who was violated in captivity marrying a priest. The Talmud answers: The tanna taught the superfluous halakha that a woman claiming that she was taken captive and remained pure is deemed credible as an introduction, due to the fact that he sought to subsequently teach the case of two women who were taken captive.