Leviticus Chapter 16, Verse 18
From BibleWiki
18: And he shall go out unto the altar that is before the LORD,
and make an 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.
18: And when he is come out to the altar that is before the Lord, let
him pray for himself: and taking the blood of the calf, and of the buck
goat, let him pour it upon the horns thereof round about.
18: And he shall come forth to the altar that is before the Lord, and he shall make atonement upon it; and he shall take of the blood of the calf, and of the blood of the goat, and shall put it on the horns of the altar round about.
Leviticus Chapter 16, Verse 18/commentary

