Charles Ellicott Commentary Leviticus 4:8

"And all the fat of the bullock of the sin-offering he shall take off from it; the fat that covereth the inwards, and all the fat that is upon the inwards," — Leviticus 4:8 (ASV)

And he shall take off from it all the fat. —That is, the best or choicest part. (See Leviticus 3:3.) At the time of Christ the sin offering was cut open, the fat and inwards were taken out, put into a vessel, salted, stewed on the fire, and burnt upon the altar as a sweet savour unto the Lord.