Leviticus 16:32-34

32The kohen who is anointed and who is consecrated to be kohen in his father’s place will make the atonement, and put on the linen garments, the holy garments.

33He is to make atonement for the Holy Sanctuary, for the Tent of Meeting, for the altar, for the kohanim, and for all the people of the assembly.

34“This will be an everlasting statute for you, to make atonement for Bnei-Yisrael once in the year because of all their sins.” It was done as Adonai commanded Moses.