The Greek noun halōn (ἅλων) refers to a threshing floor — the hard, flat surface (often circular) where harvested grain was spread and beaten or trampled to separate the kernels from the chaff. John the Baptist uses the threshing floor as a central metaphor for the coming judgment of the Messiah.
John the Baptist declared that the Coming One would clear His threshing floor — gathering wheat into the barn while burning the chaff with unquenchable fire (Matthew 3:12; Luke 3:17). The threshing floor is a metaphor for eschatological separation: the genuine from the false, the saved from the lost. Ruth's encounter with Boaz on the threshing floor (Ruth 3) foreshadows the intimate covenant relationship between redeemer and redeemed.