Leviticus 3:3-4

³And they shall offer of the sacrifice of peaceable things into offering to the Lord, the fatness that covereth the entrails, and whatever thing of fatness is within; (And they shall offer for the peace offering, as a burnt sacrifice to the Lord, the fat that covereth the innards, and whatever fat is within;)

⁴they shall offer the two kidneys with the fatness by which the guts called ileum be covered, and the caul of the liver, with the little reins, (or with the kidneys).