Leviticus 1:5
You are to kill the bull in the Lord's presence, and Aaron's sons, the priests, are to take the blood and sprinkle it on all sides of the altar at the entrance to the Tent of Meeting.You are to kill the bull in the Lord's presence, and Aaron's sons, the priests, are to take the blood and sprinkle it on all sides of the altar at the entrance to the Tent of Meeting.