Numbers 30:2-4

New Revised Standard Version Updated Edition

² When a man makes a vow to the Lord or swears an oath to bind himself by a pledge, he shall not break his word; he shall do according to all that proceeds out of his mouth.^(A)

³ “When a woman makes a vow to the Lord or binds herself by a pledge while within her father’s house, in her youth, ⁴ and her father hears of her vow or her pledge by which she has bound herself and says nothing to her, then all her vows shall stand, and any pledge by which she has bound herself shall stand.