Leviticus 22:2–7

²Speak 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 the things that they hallow unto me: I am Jehovah. ³Say unto them, Every one of all your seed, throughout your generations, that approacheth 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. ⁴Whatsoever man of the seed of Aaron is a leper, or hath a flux, he shall not eat of the holy things, until he is clean. And he that toucheth any one that is unclean by a dead person, or a man whose seed of copulation hath passed from him; ⁵or a man that toucheth any crawling thing whereby he becometh unclean, or a man by whom he may become unclean, whatever may be his uncleanness, ⁶—a person that toucheth any such shall be unclean until even, and shall not eat of the holy things; but he shall bathe his flesh with water, ⁷and when the sun goeth down, he shall be clean, and may afterwards eat of the holy things; for it is his food.