(Mishnah): The way of Chachamim, before his daughter leaves him [for Nisu'in], he tells her 'all vows that you vowed in my house are annulled.'

Similarly, a husband, before she enters his Reshus (Nisu'in), he tells her 'all vows that you vowed before entering my Reshus, they are annulled.'

This is because after she enters his Reshus, he cannot annul [prior vows].

If a Bogeres has waited 12 months (during Eirusin), or a widow has waited 30 days, R. Eliezer says, since her husband must feed her, he can annul [her vows];

Chachamim say, a husband cannot annul until she enters his Reshus (Nisu'in).