Leviticus 16:18-20

18And he shall go out unto the altar which is before Jehovah, and make atonement for it; and shall take of the blood of the bullock, and of the goat, and put it upon the horns of the altar round about;

19and he shall sprinkle upon it of the blood with his finger seven times, and cleanse it, and hallow it from the uncleannesses of the children of Israel.

20And when he hath ended making atonement for the sanctuary, and the tent of meeting, and the altar, he shall present the living goat;