Exodus 30:10
Once a year Aaron shall make atonement on the horns of the altar. Throughout your generations he shall make atonement on it annually with the blood of the sin offering of atonement. The altar is most holy to the LORD."

Leviticus 4:7
The priest must then apply some of the blood to the horns of the altar of fragrant incense that is before the LORD in the Tent of Meeting. And he is to pour out the rest of the bull's blood at the base of the altar of burnt offering at the entrance to the Tent of Meeting.

Leviticus 4:25
Then the priest is to take some of the blood of the sin offering with his finger, apply it to the horns of the altar of burnt offering, and pour out the rest of the blood at the base of the altar.

Leviticus 16:17
No one may be in the Tent of Meeting from the time Aaron goes in to make atonement in the Most Holy Place until he leaves, after he has made atonement for himself, his household, and the whole assembly of Israel.

Numbers 28:22
Include one male goat as a sin offering to make atonement for you.

Ezekiel 43:20
You are to take some of its blood and put it on the four horns of the altar, on the four corners of the ledge, and all around the rim; thus you will cleanse the altar and make atonement for it.

Ezekiel 43:22
On the second day you are to present an unblemished male goat as a sin offering, and the altar is to be cleansed as it was with the bull.

Ezekiel 45:19
And the priest is to take some of the blood from the sin offering and put it on the doorposts of the temple, on the four corners of the ledge of the altar, and on the gateposts of the inner court.