Leviticus 16:25

Aaron shall come into the Tent of Meeting, and shall take off the linen garments, which he put on when he went into the Holy Place, and shall leave them there.

Then he shall bathe himself in water in a holy place, and put on his garments, and come out and offer his burnt offering and the burnt offering of the people, and make atonement for himself and for the people.

He who lets the goat go for the scapegoat shall wash his clothes, and bathe his flesh in water, and afterward he shall come into the camp.

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 forth outside the camp; and they shall burn their skins, their flesh, and their dung with fire.