Leviticus 3:2-5

2You are to lay your hand on the head of your offering and slaughter it at the entrance to the tent of meeting. Then Aaron’s sons the priests shall splash the blood against the sides of the altar.

3From the fellowship offering you are to bring a food offering to the Lord: the internal organs and all the fat that is connected to them,

4both kidneys with the fat on them near the loins, and the long lobe of the liver, which you will remove with the kidneys.

5Then Aaron’s sons are to burn it on the altar on top of the burnt offering that is lying on the burning wood; it is a food offering, an aroma pleasing to the Lord.