Deuteronomy 23:21-24:4

21If you make a vow to the LORD your God, do not be slow to pay it, for the LORD your God will certainly demand it of you and you will be guilty of sin. 22But if you refrain from making a vow, you will not be guilty.

23Whatever your lips utter you must be sure to do, because you made your vow freely to the LORD your God with your own mouth. 24If you enter your neighbor’s vineyard, you may eat all the grapes you want, but do not put any in your basket. 25If you enter your neighbor’s grainfield, you may pick kernels with your hands, but you must not put a sickle to their standing grain.

1If a man marries a woman who becomes displeasing to him because he finds something indecent about her, and he writes her a certificate of divorce, gives it to her and sends her from his house, 2and if after she leaves his house she becomes the wife of another man, 3and her second husband dislikes her and writes her a certificate of divorce, gives it to her and sends her from his house, or if he dies,

4then her first husband, who divorced her, is not allowed to marry her again after she has been defiled. That would be detestable in the eyes of the LORD . Do not bring sin upon the land the LORD your God is giving you as an inheritance.