Deuteronomy 7:20-24

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

Thou shalt not be affrighted at them: for the LORD thy God is among you, a mighty God and terrible.

And the LORD thy God will put out those nations before thee by little and little: thou mayest not consume them at once, lest the beasts of the field increase upon thee.

But the LORD thy God shall deliver them unto thee, and shall destroy them with a mighty destruction, until they be destroyed.

And he shall deliver their kings into thine hand, and thou shalt destroy their name from under heaven: there shall no man be able to stand before thee, until thou have destroyed them.