Leviticus 3:8-9

⁸And he shall lay his hands on the head of his offering, and shall kill it by the doors of the tabernacle of witness; and the priests the sons of Aaron shall pour out the blood on the altar round about.

⁹And he shall bring of the peace-offering a burnt sacrifice to the Lord: the fat and the hinder part unblemished he shall take away with the loins, and having taken away all the fat that covers the belly, and all the fat that is on the belly,