Keluaran 29:13

29:13 You are to take all the fat that covers the entrails, and the lobe ¹  that is above the liver, and the two kidneys and the fat that is on them, and burn them ²  on the altar.

Keluaran 29:17

29:17 Then you are to cut the ram into pieces and wash the entrails and its legs and put them on its pieces and on its head

[29:13]  ¹ tn S. R. Driver suggests that this is the appendix or an appendix, both here and in v. 22 (Exodus, 320). “The surplus, the appendage of liver, found with cow, sheep, or goat, but not with humans: Lobus caudatus” (HALOT 453 s.v. יֹתֶרֶת).

[29:13]  ² tn Heb “turn [them] into sweet smoke” since the word is used for burning incense.

[29:13]  sn The giving of the visceral organs and the fat has received various explanations. The fat represented the best, and the best was to go to God. If the animal is a substitute, then the visceral organs represent the will of the worshiper in an act of surrender to God.