Numbers 30:7-9

New Century Version

⁷ and if her husband hears about it and says nothing, she must keep her promise or the pledge she made. ⁸ But if her husband hears about it and does not allow it, he cancels her pledge or the careless promise she made. The Lord will free her from keeping it.

⁹ “If a widow or divorced woman makes a promise, she must do whatever she promised.