'Chaff' in the Bible

"At that time the people of Judah and Jerusalem will be told, 'A scorching wind will sweep down from the hilltops in the desert on my dear people. It will not be a gentle breeze for winnowing the grain and blowing away the chaff.

I will scatter you like drifting chaffbefore the desert wind.

The prophet that hath a dream, let him tell a dream; and he that hath my word, let him speak my word faithfully. What is the chaff to the wheat? saith the LORD.

I will send people to winnow Babylonia like a wind blowing away chaff. They will winnow her and strip her land bare. This will happen when they come against her from every direction, when it is time to destroy her.