'Chaff' in the Bible

The nations roar on like the roaring of many waters,But God will rebuke them and they will flee far away,And be chased like chaff on the mountains before the wind,Or like whirling dust before the storm.

But the multitude of your enemies [that assault you] will become like fine dust,And the multitude of the tyrants like the chaff which blows away;And it will happen in an instant, suddenly [that your enemy is destroyed].

“You have conceived dried grass, you will give birth to stubble;My breath is a fire that will consume you.

“Who has stirred up and put into action one from the east [the king of Persia, Cyrus the Great]Whom He calls in righteousness to His service and whom victory meets at every step?The Lord turns nations over to himAnd subdues kings.He makes them like dust with his sword,Like wind-driven chaff with his bow.

“In fact, I have made of you a new, sharp threshing implement with sharp edges;You will thresh the mountains and crush them,And make the hills like chaff.