Kesubos 7:8-9

Kesubos 7:8

If blemishes were discovered in a betrothed woman while she is still in her father’s house, the father must provide proof that they were acquired after she was betrothed and it’s the groom’s disadvantage. If she already married, the burden of proof is on the husband to show that the blemishes were acquired after she was betrothed and that he was deceived. This is the opinion of Rabbi Meir. The Sages say that the latter only refers to blemishes that are concealed; when it comes to visible blemishes, the husband cannot claim he was deceived. If there is a bathhouse in the city, he cannot even make such a claim about concealed blemishes because he can send his female relatives to examine her.

Kesubos 7:9

If a man develops defects, they do not compel him to divorce his wife. Rabban Shimon ben Gamliel says that this only applies to minor defects; in the case of major defects, they do so compel him.