Numbers 30:6-8

6“But if she marries while under her vows or if she has bound herself by a rash statement,

7and her husband hears of it and says nothing about it on the day he hears it, then her vows shall stand and her pledge by which she bound herself shall stand.

8But if her husband disapproves of her [making her vow or pledge] on the day that he hears of it, then he shall annul her vow which she is under and the rash statement of her lips by which she bound herself; and the Lord will forgive her.