Leviticus 8:16

“And he took all the fat that was upon the inwards, etc.] Called the “omentum”: and the caul [above] the liver; the lobe upon the liver, as the Septuagint; or “the caul” and “the liver”, so says Jarchi; the liver separately, for he took a little of the liver with it, the caul: and the two kidneys, and their fat, and Moses burned [it] upon the altar: the fat of these several parts, which has been often observed was done; and in imitation of which, the same has been done by the Persians and their Magi, as related by Strabo f189 and others f190; and by the Romans, to which Persius f191 refers; and these several parts are generally covered with fat in fat creatures, and especially sheep, as…”

“Moses as the mediator of the covenant of the Law Galatians 3:19; Hebrews 8:6 was called to perform the priestly functions, in consecrating those on whom henceforth those functions were to devolve, and in inaugurating the legal order of sacrifices. See Exodus 40:23 note. The sin-offering was now offered for the first time. The succession in which the sacrifices followed each other on this occasion, first the sin-offering, then the burnt-offering, and lastly the peace-offering, has its ground in the meaning of each sacrifice, and became the established custom in later ages. The worshipper passed through a spiritual process. He had transgressed the Law, and he needed the atonement signified by…”

“Lev 3:3-5, Lev 4:8, Lev 4:9; Exo 29:13 Leviticus 8:17”