Charles Ellicott Commentary Leviticus 8:26-28

"and out of the basket of unleavened bread, that was before Jehovah, he took one unleavened cake, and one cake of oiled bread, and one wafer, and placed them on the fat, and upon the right thigh: and he put the whole upon the hands of Aaron, and upon the hands of his sons, and waved them for a wave-offering before Jehovah. And Moses took them from off their hands, and burnt them on the altar upon the burnt-offering: they were a consecration for a sweet savor: it was an offering made by fire unto Jehovah." — Leviticus 8:26-28 (ASV)

And out of the basket. -The description in these three verses of the rites performed at the sacrifice of consecration is exactly in accordance with the orders given in Exodus 29:23-25. The right shoulder, and one cake of each of the three unleavened kinds, which formed the officiating priests’ share of the sacrifices (Leviticus 7:32), and which were ordinarily eaten by them and their families, Moses on this occasion burned upon the altar, after being placed in the hands of Aaron and his sons, and waved before the Lord.