Deuteronomy 15:12-15

12“If your fellow Israelite, a Hebrew man or woman, is sold to you, and serves you for six years, then in the seventh year you shall set him free [from your service].

13When you set him free, you shall not let him go away empty-handed.

14You shall give him generous provisions from your flock, from your threshing floor and from your wine press; you shall give to him as the Lord your God has blessed you.

15And you shall remember and thoughtfully consider that you were [once] a slave in the land of Egypt, and the Lord your God redeemed you; therefore, I am commanding you these things today.