TSK · Leviticus 11:28

Carcass Uncleanness“‘By these you defile yourselves; anyone who touches their carcass will be unclean until the evening,

and the priest is to make one of them a sin offering and the other a burnt offering. So the priest is to make atonement for him before the LORD for his discharge.

Regulations for Eating Carcasses“‘Any person who eats an animal that has died of natural causes or an animal torn by beasts, whether a native citizen or a resident foreigner, must wash his clothes, bathe in water, and be unclean until evening; then he becomes clean.

Then the priest must wash his clothes and bathe himself in water, and afterward he may come into the camp, but the priest will be ceremonially unclean until evening.