Leviticus 3:5

3He shall offer of the sacrifice of peace offerings an offering made by fire to the LORD. The fat that covers the innards, and all the fat that is on the innards,

4and 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.

5Aaron’s sons shall burn it on the altar on the burnt offering, which is on the wood that is on the fire: it is an offering made by fire, of a pleasant aroma to the LORD.

6“‘If his offering for a sacrifice of peace offerings to the LORD is from the flock, either male or female, he shall offer it without defect.

7If he offers a lamb for his offering, then he shall offer it before the LORD;