Leviticus 22:3-7

MSB(i) 3 Tell them that for the generations to come, if any of their descendants in a state of uncleanness approaches the sacred offerings that the Israelites consecrate to the LORD, that person must be cut off from My presence. I am the LORD. 4 If a descendant of Aaron has a skin disease or a discharge, he may not eat the sacred offerings until he is clean. Whoever touches anything defiled by a corpse or by a man who has an emission of semen, 5 or whoever touches a crawling creature or a person that makes him unclean, whatever the uncleanness may be— 6 the man who touches any of these will remain unclean until evening. He must not eat from the sacred offerings unless he has bathed himself with water. 7 When the sun has set, he will become clean, and then he may eat from the sacred offerings, for they are his food.