Leviticus 3:9-10

9From the 1sacrifice of peace offerings he shall then bring as an offering by fire to the Lord, its fat, the entire fat tail which he shall remove close to the backbone, the fat that covers the entrails, and all the fat that is on the entrails,

10and the two kidneys with the fat that is on them, which is on the loins, and the 2lobe of the liver, which he shall remove 3with the kidneys.