Leviticus 22:1-4

¹And the Lord spoke to Moses, saying,

²Speak to Aaron and to his sons, and let them take heed concerning the holy things of the children of Israel, so they shall not profane my holy name in any of the things which they consecrate to me: I am the Lord.

³Say to them, Every man throughout your generations, whoever of all your seed shall approach to the holy things, whatsoever the children of Israel shall consecrate to the Lord, while his uncleanness is upon him, that soul shall be cut off from me: I am the Lord your God.

⁴And the man of the seed of Aaron the priest, if he should have leprosy or issue of the reins, shall not eat of the holy things, until he be cleansed; and he that touches any uncleanness of a dead body, or the man whose seed of copulation shall have gone out from him,