Deuteronomy 24:20

And if thou shouldest gather thine olives, thou shalt not return to collect the remainder; it shall be for the stranger, and the fatherless, and the widow, and thou shalt remember that thou wast a bondman in the land of Egypt; therefore I command thee to do this thing.

And you shall remember that you were a bondman in the land of Egypt, and the Lord your God redeemed you from thence; therefore I charge you to do this thing.

When thou beatest thine olive tree, thou shalt not go over the boughs again: it shall be for the stranger, for the fatherless, and for the widow.