Thematic Bible: Excluded from priest's office

Speak unto Aaron and to his sons, that they separate themselves from the holy things of the children of Israel, and that they profane not my holy name in those things which they hallow unto me: I am the LORD. Say unto them, Whosoever he be of all your descendants among your generations, that goes unto the holy things, which the children of Israel hallow unto the LORD, having uncleanness upon him, that soul shall be cut off from my presence: I am the LORD. Whatsoever man of the descendants of Aaron who is a leper, or has a discharge; he shall not eat of the holy things, until he is clean. And whoever touches any thing that is defiled by a dead body, or a man who has had an emission of semen;