Deuteronomy 24:17-19

17“You shall not pervert justice due the stranger or the fatherless, nor take a widow’s garment as a pledge.

18But you shall remember that you were a slave in Egypt, and the Lord your God redeemed you from there; therefore I command you to do this thing.

19“When you reap your harvest in your field, and forget a sheaf in the field, you shall not go back to get it; it shall be for the stranger, the fatherless, and the widow, that the Lord your God may bless you in all the work of your hands.