John Gill Commentary Exodus 29:27

"And thou shalt sanctify the breast of the wave-offering, and the thigh of the heave-offering, which is waved, and which is heaved up, of the ram of consecration, even of that which is for Aaron, and of that which is for his sons:" — Exodus 29:27 (ASV)

And you shall sanctify the breast of the wave offering
Set it apart for the use of the priest in all succeeding ages:

and the shoulder of the heave offering :
as the breast was waved from one hand to another, or cast from the hand of one to the hand of another; the shoulder was heaved up, or cast up and caught again: this also was to be sanctified or set apart for the priest's use, (Leviticus 7:32–34) ,

which is waved, and which is heaved up of the ram of the consecration :
the breast was waved and the shoulder heaved:

even of that which is for Aaron, and of that which is for his sons ;
as these two parts before mentioned in peace offerings were.