Leviticus 16:32-34

32And the priest who hath been anointed, and who hath been consecrated, to exercise the priesthood in his father's stead, shall make atonement; and he shall put on the linen garments, the holy garments. 33And he shall make atonement for the holy sanctuary; and for the tent of meeting, and for the altar shall he make atonement; and for the priests, and for the whole people of the congregation shall he make atonement. 34And this shall be an everlasting statute unto you, to make atonement for the children of Israel [to cleanse them] from all their sins once a year. And he did as Jehovah had commanded Moses.