Numbers 30:2-4

New International Version

² When a man makes a vow to the Lord or takes an oath to obligate himself by a pledge, he must not break his word but must do everything he said.^(A)

³ “When a young woman still living in her father’s household makes a vow to the Lord or obligates herself by a pledge ⁴ and her father hears about her vow or pledge but says nothing to her, then all her vows and every pledge by which she obligated herself will stand.^(B)