Yevamot 43B

ולית ליה לרבי יוסי להבחין?

The Talmud asks: But does R' Yosei not accept that there is a decree to wait 3 months in order to distinguish between the seed of the first and second husbands? According to the Talmud’s emendation of his statement, it would appear there is no case in which R' Yosei applies the decree.

לית ליה. ואיבעית אימא: לעולם אית ליה, ואימא, רבי יוסי אומר: כל ארוסות גרושות ינשאו.

The Talmud answers: Indeed, he does not accept the decree. And if you wish, say that actually, he does accept the decree and applies it in the case of a married woman who was divorced. And with regard to the challenge to his opinion from the a fortiori inference, emend the Mishnah and say: R' Yosei says that all women who were only betrothed to their previous husbands and then divorced may be married within 3 months, since the reason to wait does not apply in this case.

אי הכי, היינו רבי יהודה? איכא בינייהו נשואה ליארס. רבי יהודה סבר: נשואה מותרת ליארס. ורבי יוסי סבר: נשואה אסורה ליארס.

The Talmud asks: If so, then this opinion of R' Yosei is identical to the opinion of R' Yehuda. What difference is there between them? The Talmud answers: There is a practical difference between them in the case of a woman who was married to her previous husband and seeks to be betrothed. R' Yehuda holds that it is permitted to betroth a woman who was married to her previous husband without first waiting 3 months. And R' Yosei holds that it is prohibited to betroth a woman who was married to her previous husband without first waiting 3 months.

וסבר רבי יוסי נשואה אסורה ליארס? והתניא, רבי יוסי אומר: כל הנשים יתארסו, חוץ מן האלמנה מפני האיבול, וכמה איבול שלה ⁠— שלשים יום. וכולן לא ינשאו עד שיהו להן שלשה חדשים.

The Talmud asks: But does R' Yosei really hold that it is prohibited to betroth a woman who was married to her previous husband without first waiting 3 months? Isn’t it taught in a baraita: R' Yosei says that all women may be betrothed without waiting except for a widow, due to the mourning period she must observe for her deceased husband; and how long is her mourning period? It is 30 days. And none of them may be married until they have waited 3 months.