Judges 2:20-22

And the anger of Jehovah was kindled against Israel; and he said, Because this nation have transgressed my covenant which I commanded their fathers, and have not hearkened unto my voice; I also will not henceforth drive out any from before them of the nations that Joshua left when he died; that by them I may prove Israel, whether they will keep the way of Jehovah to walk therein, as their fathers did keep it, or not.