Leviticus 16:23-25

New Century Version

²³ “Then Aaron will enter the Meeting Tent and take off the linen clothes he had put on before he went into the Most Holy Place; he must leave these clothes there. ²⁴ He will bathe his body in water in a holy place and put on his regular clothes. Then he will come out and offer the whole burnt offering for himself and for the people, to remove sins from himself and the people so they will belong to the Lord. ²⁵ Then he will burn the fat of the sin offering on the altar.