Numbers 30:3-5

New Century Version

³ If a young woman still living at home makes a promise to the Lord or pledges to do something special, ⁴ and if her father hears about the promise or pledge and says nothing, she must do what she promised. She must keep her pledge. ⁵ But if her father hears about the promise or pledge and does not allow it, then the promise or pledge does not have to be kept. Her father would not allow it, so the Lord will free her from her promise.