Leviticus 26:36-37

36“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.

37They will stumble over one another as if fleeing from a sword though no one is pursuing them. You will not be able to stand against your enemies.