εὔκαρπον ἐκβάλλειν στάχυν

From LSJ

ἄμμες δὲ γ' ἐσσόμεσθα πολλῷ κάρρονες → and we shall be better by far | we shall be sometime mightier men by far than both | sometime we shall become much better than you | so we shall be, and braver far

Source

Greek > English (Woodhouse)

yield a rich harvest