Leviticus 22:1-3

American Standard Version

22 And Jehovah spake unto Moses, saying, ² Speak unto Aaron and to his sons, that they separate themselves from the holy things of the children of Israel, which they hallow unto me, and that they profane not my holy name: I am Jehovah. ³ Say unto them, Whosoever he be of all your seed throughout your generations, that approacheth unto the holy things, which the children of Israel hallow unto Jehovah, having his uncleanness upon him, that soul shall be cut off from before me: I am Jehovah.