Judges 2:20 So the anger of the Lord burned against Israel, and He said, “Because this nation has transgressed My covenant which I commanded their fathers and has not listened to My voice, 21 I also will no longer drive out before them any of the nations which Joshua left when he died, 22 in order to test Israel by them, whether they will keep the way of the Lord to walk in it as their fathers did, or not.” 23 So the Lord allowed those nations to remain, not driving them out quickly; and He did not give them into the hand of Joshua.

Judges 2:7 So the people served the Lord all the days of Joshua, and all the days of the elders who outlived Joshua, who had seen all the great works of the Lord which He had done for Israel. 10 When all that generation had been gathered to their fathers, another generation arose after them who did not know the Lord nor the work which He had done for Israel.