Leviticus 25:42 KJV
For they are my servants, which I brought forth out of the land of Egypt: they shall not be sold as bondmen.
Leviticus 25:42, King James Version
In context
41 And then shall he depart from thee, both he and his children with him, and shall return unto his own family, and unto the possession of his fathers shall he return.
42 For they are my servants, which I brought forth out of the land of Egypt: they shall not be sold as bondmen.
43 Thou shalt not rule over him with rigour; but shalt fear thy God.