'Wind driven' in the Bible

“I will put anxiety in the hearts of those of you who survive in the lands of their enemies. The sound of a wind-driven leaf will put them to flight, and they will flee as one flees from a sword, and fall though no one is pursuing them.

Will You frighten a wind-driven leaf?Will You chase after dry straw?

Who has stirred him up from the east?He calls righteousness to his feet.The Lord hands nations over to him,and he subdues kings.He makes them like dust with his sword,like wind-driven stubble with his bow.