Numbers 30:7-8, 13

and her husband hears about it and says nothing to her when he finds out, her vows are binding, and the obligations she put herself under are binding. But if her husband prohibits her when he hears about it, he will cancel her vow that is binding or the rash commitment she herself made, and the LORD will release her.

Her husband may confirm or cancel any vow or any sworn obligation to deny herself.