Exodus 23:27,28

I will send my fear before thee And they that fear will soon flee: I will strike a terror into the inhabitants of Canaan, which shall facilitate the conquest of them, Joel 2:9. I will send hornets before thee Thus Joshua observes, (Joshua 24:12,) that the Amorites were driven out, not by the sword and bow of the Israelites, but by the sting of these hornets, which are a kind of wasps, only larger and fiercer than the ordinary wasp. Some explain the word hornet metaphorically, I will send my terror before thee as a hornet, it appearing to them improbable that a parcel of insects should drive out a nation. But they are fully confuted by Bochart, who produces many instances of nations being forced to leave their country by these and such like contemptible creatures, appealing to the testimony of Herodotus, Appianus, and Strabo. And he particularly observes, that the sting of this sort of wasp, called a hornet, is of all others the most pernicious; for it seldom stings a man, as Pliny says, (lib. 11. c. 21,) without throwing him into the rage of a fever.