Leviticus 23:21-22

On that same day you will call a holy meeting; you must not do any work that day. This law will continue for you from now on, wherever you live. “ ‘When you harvest your crops on your land, do not harvest all the way to the corners of your field. If grain falls onto the ground, don’t gather it up. Leave it for poor people and foreigners in your country. I am the LORD your God.’ ”