Isaiah ends this part of the chapter by confirming for whom the vision was meant. Judah was the threshed and winnowed one—with the emphasis not on the wheat produced by such a process but on the trampling of the people. The nation had been threshed; they had sinned badly, but they remained God's people.
10 O my threshed and winnowed one, what I have heard from the LORD of hosts, the God of Israel, I announce to you.