'Chaff' in the Bible

The nations roar like the rushing of many waters, but the LORD will rebuke them, and they will run far away, chased like chaff blown down from the mountains or like thick dust that rolls along, blown along by a wind storm.

"But the hordes of your enemies will become like fine dust, and the hordes of tyrants like flying chaff. Then suddenly, in an instant,

"See, I'm making you into a new, sharp, and multi-tooth threshing sledge. You'll thresh and crush the mountains, and make the hills like chaff.