Priests: Ceremonies at Consecration of Offering Sacrifices
Source: TTT
Exodus 29:10–19
You are to present the bull at the front of the Tent of Meeting, and Aaron and his sons are to lay their hands on its head. / And you shall slaughter the bull before the LORD at the entrance to the Tent of Meeting. / Take some of the blood of the bull and put it on the horns of the altar with your finger; then pour out the rest of the blood at the base of the altar.
Leviticus 8:14–23
Moses then brought the bull near for the sin offering, and Aaron and his sons laid their hands on its head. / Moses slaughtered the bull, took some of the blood, and applied it with his finger to all four horns of the altar, purifying the altar. He poured out the rest of the blood at the base of the altar and consecrated it so that atonement could be made on it. / Moses also took all the fat that was on the entrails, the lobe of the liver, and both kidneys and their fat, and burned it all on the altar.