Numbers 30:2-4

Holman Christian Standard Bible

² When a man makes a vow to the Lord or swears an oath to put himself under an obligation, he must not break his word; he must do whatever he has promised.^(A)

³ “When a woman in her father’s house during her youth makes a vow to the Lord or puts herself under an obligation, ⁴ and her father hears about her vow or the obligation she put herself under, and he says nothing to her, all her vows and every obligation she put herself under are binding.