Leviticus 3:4-9

4both kidneys with the fat on them near the loins, and the lobe of the liver, which he is to remove with the kidneys. 5Then Aaron’s sons are to burn it on the altar atop the burnt offering that is on the burning wood, as a food offering, a pleasing aroma to the LORD.

6If, however, one’s peace offering to the LORD is from the flock, he must present a male or female without blemish.

7If he is presenting a lamb for his offering, he must present it before the LORD. 8He is to lay his hand on the head of his offering and slaughter it in front of the Tent of Meeting. Then Aaron’s sons shall splatter its blood on all sides of the altar.

9And from the peace offering he shall bring a food offering to the LORD consisting of its fat: the entire fat tail cut off close to the backbone, the fat that covers the entrails, all the fat that is on them,