R. Hanina said: He who keeps silence [when his wife vows] in order to provoke her can annul even after ten days. Raba objected: When was it said that if the husband dies his authority is transferred to the father? If the husband did not hear [the vow], or heard it and was silent, or heard and annulled it and died on the same day. But if he heard and confirmed it, or heard it, was silent, and died on the following day, he [the father] cannot annul. Now, surely it means that he kept his silence in order to vex her? — No. It means that he was silent in order to confirm it. If so, it is tantamount to 'or if he heard and confirmed it?' — But it means that he kept silent without specifying [his intentions]. R. Hisda objected: Confirmation is more stringent than annulment, and annulment is more stringent than confirmation. [Thus:] Confirmation is more stringent,