Deuteronomy 15:12-15

12“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.

13And when you send him away free from you, you shall not let him go away empty-handed;

14you shall supply him liberally from your flock, from your threshing floor, and from your winepress. From what the Lord your God has blessed you with, you shall give to him.

15You shall remember that you were a slave in the land of Egypt, and the Lord your God redeemed you; therefore I command you this thing today.