Leviticus 16:24-28

24and he shall bathe his flesh in water in a holy place, and put on his garments, and come forth, and offer his burnt-offering and the burnt-offering of the people, and make atonement for himself and for the people. 25And the fat of the sin-offering shall he burn upon the altar. 26And he that letteth go the goat for Azazel shall wash his clothes, and bathe his flesh in water, and afterward he shall come into the camp. 27And the bullock of the sin-offering, and the goat of the sin-offering, whose blood was brought in to make atonement in the holy place, shall be carried forth without the camp; and they shall burn in the fire their skins, and their flesh, and their dung. 28And he that burneth them shall wash his clothes, and bathe his flesh in water, and afterward he shall come into the camp.