Leviticus 3:3-5

3From the sacrifice of the peace offerings he shall then present an offering by fire to the Lord, the fat that covers the entrails and all the fat that is on the entrails,

4and the two kidneys with the fat that is on them, which is on the loins, and the 1lobe of the liver, which he shall remove with the kidneys.

5Then 2Aaron’s sons shall offer it up in smoke on the altar 3on the burnt offering, which is on the wood that is on the fire; 4it is an offering by fire of a soothing aroma to the Lord.