Leviticus 16:16-18

16So he shall make atonement for the Holy Place (Holy of Holies) because of the uncleanness and transgressions of the Israelites, for all their sins. He shall also do this for the Tent of Meeting which is among them in the midst of their uncleanness (impurities).

17There shall be no person in the Tent of Meeting when the high priest goes in to make atonement in the Holy Place [within the veil] until he comes out, so that he may make atonement for himself (his own sins) and for his household and for all the congregation of Israel.

18Then he shall go out to the altar [of burnt offering in the court] which is before the Lord and make atonement for it, and shall take some of the blood of the bull and of the goat and put it on the horns of the altar on all sides.