Ye shall offer up a cake of the first of
your dough [for] an heave offering: as [ye do] the heave offering of the
threshingfloor, so shall ye heave it.
BSB
From the first of your dough, you are to lift up a cake as a contribution; offer it just like an offering from the threshing floor.
WEB
Of the first of your dough you shall offer up a cake for a wave offering: as the wave offering of the threshing floor, so you shall heave it.
YLT
the beginning of your dough a cake ye heave up—a heave-offering; as the heave-offering of a threshing-floor, so ye do heave it.