Leviticus 17:15-16

15Every person who eats an animal which dies [of natural causes] or was torn by a predator, whether he is native-born or a stranger, he shall wash his clothes and bathe in water, and be [ceremonially] unclean until evening; then he will become clean.

16But if he does not wash his clothes or bathe his body, he shall bear his guilt [for it will not be borne by the sacrifice of atonement].”