He put all these in the hands of Aaron and his sons and waved them before the LORD as a wave offering.
The covenant of priesthood must be made by sacrifice, as well as other covenants, Psa 50:5. And thus Christ was consecrated by the sacrifice of himself, once for all. Sacrifices of each kind must be offered for the priests, that they might with the more tenderness and concern offer the gifts and sacrifices of the people, with compassion on the ignorant, and on those that...
Commenting on Leviticus 8:14-30
And he put all upon Aaron's hands, and upon his son's hands,.... The fat and the right shoulder, with the cakes upon them: and waved them for a wave offering before the Lord; See Gill on Exo 29:24.
And waved them for a wave-offering - See the nature of this and the heave-offering in the note on Exo 29:27 (note).