John Gill Commentary Leviticus 8:27

"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." — Leviticus 8:27 (ASV)

And he put all upon Aaron's hands, and upon his son's hands ,
&c.] The fat and the right shoulder, with the cakes upon them:

and waved them [for] a wave offering before the Lord ;
(See Gill on Exodus 29:24).