Leviticus 16:26-28

26“The man who releases the goat as a scapegoat must wash his clothes and bathe himself with water; afterward he may come into the camp. 27The bull and the goat for the sin offerings, whose blood was brought into the Most Holy Place to make atonement, must be taken outside the camp; their hides, flesh and intestines are to be burned up. 28The man who burns them must wash his clothes and bathe himself with water; afterward he may come into the camp.