Thematic Bible: Some of, left to prove israel

Now these are the Gentiles which the LORD left, to prove Israel with them, even as many of Israel as had not known all the wars of Canaan; he left them only that the generations of the sons of Israel might know, and to teach them war, only for those that had known nothing before: namely, five cardinals of the Philistines and all the Canaanites and the Sidonians and the Hivites that dwelt in Mount Lebanon, from Mount Baalhermon unto the entering in of Hamath.