Leviticus 7:1-5

‘Likewise this is the law of the trespass offering (it is most holy): In the place where they kill the burnt offering they shall kill the trespass offering. And its blood he shall sprinkle all around on the altar. And he shall offer from it all its fat. The fat tail and the fat that covers the entrails, the two kidneys and the fat that is on them by the flanks, and the fatty lobe attached to the liver above the kidneys, he shall remove; and the priest shall burn them on the altar as an offering made by fire to the LORD. It is a trespass offering.