Exodus 23:33 (KJV)

And I will send hornets before thee, which shall drive out the Hivite, the Canaanite, and the Hittite, from before thee.

I will not drive them out from before thee in one year; lest the land become desolate, and the beast of the field multiply against thee.

By little and little I will drive them out from before thee, until thou be increased, and inherit the land.

And I will set thy bounds from the Red sea even unto the sea of the Philistines, and from the desert unto the river: for I will deliver the inhabitants of the land into your hand; and thou shalt drive them out before thee.

Thou shalt make no covenant with them, nor with their gods.