Leviticus 16:26-28

And he who lets the goat go to Azazel shall wash his clothes and bathe his body in water, and afterward he may come into the camp. And the bull for the sin offering and the goat for the sin offering, whose blood was brought in to make atonement in the Holy Place, shall be carried outside the camp. Their skin and their flesh and their dung shall be burned up with fire. And he who burns them shall wash his clothes and bathe his body in water, and afterward he may come into the camp.