Leviticus 22:6-9

22:6 the person who touches any of these will be unclean until evening and must not eat from the holy offerings unless he has bathed his body in water. 22:7 When the sun goes down he will be clean, and afterward he may eat from the holy offerings, because they are his food. 22:8 He must not eat an animal that has died of natural causes or an animal torn by beasts and thus become unclean by it. I am the Lord. 22:9 They must keep my charge so that they do not incur sin on account of it and therefore die because they profane it. I am the Lord who sanctifies them.