Leviticus 25:39-42

“If your brother becomes poor beside you and sells himself to you, you shall not make him serve as a slave: he shall be with you as a hired worker and as a sojourner. He shall serve with you until the year of the jubilee. Then he shall go out from you, he and his children with him, and go back to his own clan and return to the possession of his fathers. For they are my servants, whom I brought out of the land of Egypt; they shall not be sold as slaves.