2And he shall lay his hand on the head of his offering and kill it at the entrance of the tent of meeting, and Aaron’s sons the priests shall throw the blood against the sides of the altar.
Leviticus 3:2 indicates that both the worshipper and the priest had different duties in preparing the animal. The worshipper was to kill the animal in the presence of the Lord. See commentary on Leviticus 1:4.
2 And he shall lay his hand on the head of his offering and kill it at the entrance of the tent of meeting, and Aaron’s sons the priests shall throw the blood against the sides of the altar.