Deuteronomy 23:19-25

19Do not charge your brother interest on money, food, or any other type of loan. 20You may charge a foreigner interest, but not your brother, so that the LORD your God may bless you in everything to which you put your hand in the land that you are entering to possess.

21If you make a vow to the LORD your God, do not be slow to keep it, because He will surely require it of you, and you will be guilty of sin. 22But if you refrain from making a vow, you will not be guilty of sin. 23Be careful to follow through on what comes from your lips, because you have freely vowed to the LORD your God with your own mouth.

24When you enter your neighbor’s vineyard, you may eat your fill of grapes, but you must not put any in your basket.

25When you enter your neighbor’s grainfield, you may pluck the heads of grain with your hand, but you must not put a sickle to your neighbor’s grain.