Deuteronomy 15:12-15

If any of your people—Hebrew men or women—sell themselves to you and serve you six years, in the seventh year you must let them go free. And when you release them, do not send them away empty-handed. Supply them liberally from your flock, your threshing floor and your winepress. Give to them as the LORD your God has blessed you. Remember that you were slaves in Egypt and the LORD your God redeemed you. That is why I give you this command today.