Leviticus 22:9-11

⁹So then, let them keep what I have put into their care, for fear that sin may come on them because of it, so causing their death because they have made it common: I am the Lord, who make them holy.

¹⁰No outside person may take of the holy food, or one living as a guest in the priest's house, or a servant working for payment.

¹¹But any person for whom the priest has given money, to make him his, may take of it with him; and those who come to birth in his house may take of his bread.