Leviticus 3:14-16

¹⁴From that offering you must dedicate these things to be a sacrifice to Yahweh that is burned: All the fat that covers the inner parts of the animal or which is attached to them,

¹⁵the kidneys with the fat that is on them near the lower back muscle, and the fat that covers the liver.

¹⁶The priest will burn those things on the altar to be an offering to Yahweh; it will be as though they will be a special food given to Yahweh. And the aroma while it burns will be pleasing to Yahweh. All the fat of the animals that are sacrificed belongs to Yahweh.