Leviticus 22:9-11

⁹Let them keep my precepts, that they may not fall into sin, and die in the sanctuary, when they shall have defiled it. I am the Lord who sanctify them.

¹⁰No stranger shall eat of the sanctified things: a sojourner of the priests, or a hired servant, shall not eat of them.

¹¹But he whom the priest hath bought, and he that is his servant, born in his house, these shall eat of them.