Leviticus 8:29

And Moses took the breast
Of the ram of consecration:

and waved it for a wave offering before the Lord;
this Moses seems to have waved with his own hands, and not upon the hands of Aaron and his sons, putting his under them, as in the wave offering of the fat, shoulder, and cakes, and for which the following words seem to give a reason:

[for] of the ram of consecration it was Moses's part;
the breast of it was his:

as the Lord commanded Moses;
see ( Exodus 29:26 ) .