Leviticus 3:3-5

3:3 Then the one presenting the offering must present a gift to the Lord from the peace offering sacrifice: He must remove the fat that covers the entrails and all the fat that surrounds the entrails, 3:4 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). 3:5 Then the sons of Aaron must offer it up in smoke on the altar atop the burnt offering that is on the wood in the fire as a gift of a soothing aroma to the Lord.

Leviticus 4:8-9

4:8 “‘Then he must take up all the fat from the sin offering bull: the fat covering the entrails and all the fat surrounding the entrails, 4:9 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)

Exodus 29:13

29:13 You are to take all the fat that covers the entrails, and the lobe that is above the liver, and the two kidneys and the fat that is on them, and burn them on the altar.