Leviticus 3:14-16

3:14 Then he must present from it his offering as a gift to the Lord: the fat which covers the entrails and all the fat on the entrails, 3:15 the two kidneys with the fat on their sinews, and the protruding lobe on the liver (which he is to remove along with the kidneys). 3:16 Then the priest must offer them up in smoke on the altar as a food gift for a soothing aroma – all the fat belongs to the Lord.