Leviticus 26:17; Leviticus 26:36

17 'I will set My face against you so that you will be struck down before your enemies; and those who hate you will rule over you, and you will flee when no one is pursuing you.

36 'As for those of you who may be left, I will also bring weakness into their hearts in the lands of their enemies. And the sound of a driven leaf will chase them, and even when no one is pursuing they will flee as though from the sword, and they will fall.