'Winnowing' in the Bible

and now, is not Boaz of our acquaintance, with whose young women thou hast been? lo, he is winnowing the threshing-floor of barley to-night,

And the oxen and the young asses serving the ground, Fermented provender do eat, That one is winnowing with shovel and fan.

At that time it is said of this people, And of Jerusalem: 'A dry wind of high places in the wilderness,' The way of the daughter of My people, (Not for winnowing, nor for cleansing,)