Numbers 30:8-12

8But if, on the day that her husband comes to hear of it, he opposes her, then he makes void her vow that was on her, and the thoughtless utterance of her lips by which she bound herself. And the Lord will forgive her.

9(But any vow of a widow or of a divorced woman, anything by which she has bound herself, shall stand against her.)

10And if she vowed in her husband's house or bound herself by a pledge with an oath,

11and her husband heard of it and said nothing to her and did not oppose her, then all her vows shall stand, and every pledge by which she bound herself shall stand.

12But if her husband makes them null and void on the day that he hears them, then whatever proceeds out of her lips concerning her vows or concerning her pledge of herself shall not stand. Her husband has made them void, and the Lord will forgive her.