Threshing floor - a Christian perspective
On "judgment day," God will separate out his followers from those who rejected him, in the same way that wheat is separated from chaff at a threshing floor.
Chaff in the Bible - a Christian perspective
John the Baptist predicts the arrival of Jesus. John predicts that Jesus will come to separate out his children from those who reject him--his chosen will be protected, but those who reject him will be destroyed.