Leviticus 3:1-4

And if his oblation be a sacrifice of peace-offerings; if he offer of the herd, whether male or female, he shall offer it without blemish before Jehovah. And he shall lay his hand upon the head of his oblation, and kill it at the door of the tent of meeting: and Aaron’s sons the priests shall sprinkle the blood upon the altar round about. And he shall offer of the sacrifice of peace-offerings an offering made by fire unto Jehovah; the fat that covereth the inwards, and all the fat that is upon the inwards, and the two kidneys, and the fat that is on them, which is by the loins, and the caul upon the liver, with the kidneys, shall he take away.