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.
KJV
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.
ASV
Of the first of your dough ye shall offer up a cake for a heave-offering: as the heave-offering of the threshing-floor, so shall ye heave it.