The sons of Aaron brought the blood to him, and he dipped his finger in the blood and applied it to the horns of the altar. And he poured out the rest of the blood at the base of the altar.

Leviticus 4:7
The priest must then put some of the blood on 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 9:10
On the altar he burned the fat, the kidneys, and the lobe of the liver from the sin offering, as the LORD had commanded Moses.

Leviticus 9:12
Then Aaron slaughtered the burnt offering. His sons brought him the blood, and he sprinkled it on all sides of the altar.

Leviticus 9:18
Then he slaughtered the ox and the ram as the people's peace offering. His sons brought him the blood, and he sprinkled it on all sides of the altar.

Ezekiel 43:15
The altar hearth shall be four cubits high, and four horns shall project upward from the hearth.

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.

And the sons of Aaron brought the blood to him: and he dipped his finger in the blood, and put it on the horns of the altar, and poured out the blood at the bottom of the altar: