Matthew Poole and continuators on Leviticus 4:35

35 And he shall take away all the fat thereof, as the fat of the lamb is taken away from the sacrifice of the peace-offerings: and the Priest shall burn them upon the altar, according to the offerings made by fire m unto the LORD; and the Priest shall make an atonement for his sin that he hath committed, and it shall be forgiven him.

(i. e.) The fat, but he useth the plural number, because the fat was of several kinds, as we saw ver. 8, 9. Heb. upon them, together with them, or after them, because the burnt-offerings were to have the first place. See on chap. 3. 5.