Leviticus 3:3-5

Revised Standard Version

³ And from the sacrifice of the peace offering, as an offering by fire to the Lord, he shall offer the fat covering the entrails and all the fat that is on the entrails, ⁴ and the two kidneys with the fat that is on them at the loins, and the appendage of the liver which he shall take away with the kidneys. ⁵ Then Aaron’s sons shall burn it on the altar upon the burnt offering, which is upon the wood on the fire; it is an offering by fire, a pleasing odor to the Lord.