Leviticus 9:13 - Ellicott's Commentary On The Whole Bible

With the pieces thereof. — Literally, according to its pieces, or piece by piece, that is, after it had been cut up into the pieces as ordered in Leviticus 1:6, and as the burnt-offering offered by Moses was cut up (see Leviticus 8:20), his sons handed the dismembered victim to him piece by piece. The process of cutting up is not mentioned, because it is implied in the fact that the ritual on this occasion was exactly the same as in the offerings made by Moses.