Exodus 12:43-45

Young's Literal Translation

⁴³ And Jehovah saith unto Moses and Aaron, `This [is] a statute of the passover; Any son of a stranger doth not eat of it;

⁴⁴ and any man's servant, the purchase of money, when thou hast circumcised him -- then he doth eat of it;

⁴⁵ a settler or hired servant doth not eat of it;