Exodus 23:29-30

23:29 I will not drive them out before you in one year, lest the land become desolate and the wild animals multiply against you. 23:30 Little by little I will drive them out before you, until you become fruitful and inherit the land.

Joshua 15:63

15:63 The men of Judah were unable to conquer the Jebusites living in Jerusalem. The Jebusites live with the people of Judah in Jerusalem to this very day.