For they are My servants, whom I brought out of the land of Egypt; they shall not be sold as slaves.
Leviticus 25:42
Surrounding context
25:41 And then he shall depart from you--he and his children with him--and shall return to his own family. He shall return to the possession of his fathers.
25:42 For they are My servants, whom I brought out of the land of Egypt; they shall not be sold as slaves.
25:43 You shall not rule over him with rigor, but you shall fear your God.