Deuteronomy 15:13

For the poor will never cease out of the land: therefore I command you, saying, You shall surely open your hand to your brother, to your needy, and to your poor, in your land.

If your brother, a Hebrew man, or a Hebrew woman, is sold to you, and serves you six years; then in the seventh year you shall let him go free from you.

you shall furnish him liberally out of your flock, and out of your threshing floor, and out of your winepress; as Yahweh your God has blessed you, you shall give to him.

You shall remember that you were a bondservant in the land of Egypt, and Yahweh your God redeemed you: therefore I command you this thing today.