Numbers 30:12-14

12But if her husband cancels it when he hears about it, nothing she said in her vow or oath has to be kept. Her husband has canceled it, and the Lord will free her ⌞from this vow or oath⌟.

13“A husband decides whether or not his wife has to keep any vow to do something or any oath to do without something.

14If he says nothing to her about it day after day, this means he’s decided that she must keep her vow or oath. She must keep it because he said nothing to her when he heard about it.