Leviticus 16:32-34

So the priest who is anointed and ordained to serve and minister as priest in his father’s place shall make atonement: he shall wear the holy linen garments, and make atonement for the Holy Sanctuary, and he shall make atonement for the Tent of Meeting, and for the altar [of burnt offering in the court]. He shall also make atonement for the priests and for all the people of the assembly. This shall be a permanent statute for you, so that atonement may be made for the children of Israel for all their sins once a year.” So he did just as the LORD had commanded Moses.