Leviticus 3:9-11

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

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

11The priest shall offer it up in smoke on the altar as food, an offering by fire to the Lord.