Exodus 23:30

Little by little I will drive them out before you, until you become fruitful and inherit the land.

Treasury of Scripture Knowledge

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

and that you may drive out all your enemies just as the Lord said.

then he will drive out all these nations ahead of you, and you will dispossess nations greater and stronger than you.

The Lord will do to them just what he did to Sihon and Og, the Amorite kings, and to their land, which he destroyed.

But the men of Manasseh were unable to conquer these cities; the Canaanites managed to remain in those areas.

So the Lord gave Israel all the land he had solemnly promised to their ancestors, and they conquered it and lived in it.