'Winnowing' in the Bible

So then, [is] not Boaz our kinsman whose maidservants you were with? Look, he [is] winnowing the barley at the threshing floor tonight.

And I have winnowed them with a winnowing fork in the gates of the land. I am bereaved. I have destroyed my people. They did not turn back from their ways.

His winnowing shovel [is] in his hand, and he will clean out his threshing floor and will gather his wheat into the storehouse, but he will burn up the chaff with unquenchable fire."

His winnowing shovel [is] in his hand, to clean out his threshing floor and to gather the wheat into his storehouse, but he will burn up the chaff with unquenchable fire."