Leviticus 7:1-5

“These are the instructions for the guilt offering. It is most holy. The animal sacrificed as a guilt offering must be slaughtered at the place where the burnt offerings are slaughtered, and its blood must be splattered against all sides of the altar. The priest will then offer all its fat on the altar, including the fat of the broad tail, the fat around the internal organs, the two kidneys and the fat around them near the loins, and the long lobe of the liver. These are to be removed with the kidneys, and the priests will burn them on the altar as a special gift presented to the LORD. This is the guilt offering.