Leviticus 25:37-39

American Standard Version

³⁷ Thou shalt not give him thy money upon interest, nor give him thy victuals for increase. ³⁸ I am Jehovah your God, who brought you forth out of the land of Egypt, to give you the land of Canaan, and to be your God.

³⁹ And if thy brother be waxed poor with thee, and sell himself unto thee; thou shalt not make him to serve as a bondservant.