Deuteronomy 7:21-23

Thou shalt not feare them: for the Lord thy God is among you, a God mightie and dreadful.

And the Lord thy God wil roote out these nations before thee by little and little: thou mayest not consume them at once, least the beasts of the fielde increase vpon thee.

But the Lord thy God shall giue them before thee, and shall destroy them with a mightie destruction, vntill they be brought to naught.