Deuteronomy 7:20

Moreover the LORD thy God will send the hornet among them, until they that are left, and hide themselves from thee, be destroyed.

God will send the hornet among them. 'It is of the same appearance and colour as the ordinary wasp, but rather more than double its size. The black line which connects the head and throat with the abdomen is about one-eighth of an inch in length, and not thicker than a horse hair. Stings from such animals must have been formidable wounds; and a region haunted by hosts of such winged lancers must speedily have been abandoned by its inhabitants' ('Tent and Khan,' p. 390: see the notes at Exodus 23:28; Joshua 24:11).