Leviticus 3:12

He shall offer from the sacrifice of peace offerings an offering made by fire to the LORD; its fat, the entire tail fat, he shall take away close to the backbone; and the fat that covers the entrails, and all the fat that is on the entrails,

and the two kidneys, and the fat that is on them, which is by the loins, and the cover on the liver, with the kidneys, he shall take away.

The priest shall burn it on the altar: it is the food of the offering made by fire to the LORD.

He shall lay his hand on its head, and kill it before the Tent of Meeting; and the sons of Aaron shall sprinkle its blood around on the altar.

He shall offer from it as his offering, an offering made by fire to the LORD; the fat that covers the innards, and all the fat that is on the innards,

and the two kidneys, and the fat that is on them, which is by the loins, and the cover on the liver, with the kidneys, he shall take away.