Leviticus 3:14-16

14And he shall offer thereof his offering, even an offering made by fire unto Yhwh; the fat that covereth the inwards, and all the fat that is upon the inwards,

15And the two kidneys, and the fat that is upon them, which is by the flanks, and the caul above the liver, with the kidneys, it shall he take away.

16And the priest shall burn them upon the altar: it is the food of the offering made by fire for a sweet savour: all the fat is Yhwh's.