Leviticus 16:26-28

“The man chosen to drive the scapegoat into the wilderness of Azazel must wash his clothes and bathe himself in water. Then he may return to the camp. “The bull and the goat presented as sin offerings, whose blood Aaron takes into the Most Holy Place for the purification ceremony, will be carried outside the camp. The animals’ hides, internal organs, and dung are all to be burned. The man who burns them must wash his clothes and bathe himself in water before returning to the camp.