Deuteronomy 23:23-25

Revised Standard Version

²³ You shall be careful to perform what has passed your lips, for you have voluntarily vowed to the Lord your God what you have promised with your mouth.

²⁴ “When you go into your neighbor’s vineyard, you may eat your fill of grapes, as many as you wish, but you shall not put any in your vessel. ²⁵ When you go into your neighbor’s standing grain, you may pluck the ears with your hand, but you shall not put a sickle to your neighbor’s standing grain.