Numbers 30:3-5

3“If a young woman makes a vow to the Lord or a pledge under oath while she is still living at her father’s home,

4and her father hears of the vow or pledge and does not object to it, then all her vows and pledges will stand.

5But if her father refuses to let her fulfill the vow or pledge on the day he hears of it, then all her vows and pledges will become invalid. The Lord will forgive her because her father would not let her fulfill them.