Leviticus 16:23-25

“Finally, Aaron will come into the Tent of Meeting and take off the linen clothes in which he dressed to enter the Holy of Holies and leave them there. He will bathe in water in a Holy Place, put on his priestly vestments, offer the Whole-Burnt-Offering for himself and the Whole-Burnt-Offering for the people, making atonement for himself and the people, and burn the fat of the Absolution-Offering on the Altar.