Leviticus 7:1-5

And this is the law of the trespass-offering: it is most holy. In the place where they kill the burnt-offering shall they kill the trespass-offering; and the blood thereof shall he sprinkle upon the altar round about. And he shall offer of it all the fat thereof: the fat tail, and the fat that covereth 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; and the priest shall burn them upon the altar for an offering made by fire unto Jehovah: it is a trespass-offering.