Leviticus 16:16-18

16and he shall make atonement for the holy place, because of the uncleannesses of the children of Israel, and because of their transgressions, even all their sins: and so shall he do for the tent of meeting, that dwelleth with them in the midst of their uncleannesses. 17And there shall be no man in the tent of meeting when he goeth in to make atonement in the holy place, until he come out, and have made atonement for himself, and for his household, and for all the assembly of Israel. 18And he shall go out unto the altar that is before Jehovah, and make atonement for it, and shall take of the blood of the bullock, and of the blood of the goat, and put it upon the horns of the altar round about.