Exodus 23:28-30

‘And I have sent the hornet before thee, and it hath cast out the Hivite, the Canaanite, and the Hittite, from before thee; I cast them not out from before thee in one year, lest the land be a desolation, and the beast of the field hath multiplied against thee; little [by] little I cast them out from before thee, till thou art fruitful, and hast inherited the land.