Leviticus 16:23-24

23“Then Aaron shall come into the tent of meeting and take off 1the linen garments which he put on when he went into the Holy Place, and shall leave them there.

24And 2he shall bathe his 3body with water in a holy place and put on 4his clothes, and come out and offer his burnt offering and the burnt offering of the people, and make atonement for himself and for the people.