Leviticus 3:1-4

‘If a man’s offering is a sacrifice of peace offerings, if he offers an animal from the herd, whether male or female, he shall offer it without blemish before the LORD. He shall lay his hand on the head of his offering [transferring symbolically his guilt to the sacrifice] and kill it at the doorway of the Tent of Meeting; and Aaron’s sons the priests shall sprinkle the blood around on the altar. From the sacrifice of the peace offerings, an offering by fire to the LORD, he shall present the fat that covers the entrails, and all the fat which is on the entrails, and the two kidneys with the fat that is on them at the loins, and the lobe of the liver which he shall remove with the kidneys.