Deuteronomy 24:19-22

19This is what you must do when you’re harvesting wheat in your field. If you forget to bring in one of the bundles of wheat, don’t go back to get it. Leave it there for foreigners, orphans, and widows. Then the Lord your God will bless you in everything you do.

20When you harvest olives from your trees, never knock down all of them. Leave some for foreigners, orphans, and widows.

21When you pick the grapes in your vineyard, don’t pick all of them. Leave some for foreigners, orphans, and widows.

22Remember that you were slaves in Egypt. So I’m commanding you to do this.