Judges 3:2-4

2if only to teach warfare to the subsequent generations of Israel, especially to those who had not known it formerly: 3the five rulers of the Philistines, all the Canaanites, the Sidonians, and the Hivites who lived in the mountains of Lebanon from Mount Baal-hermon to Lebo-hamath.

4These nations were left to test the Israelites, to find out whether they would keep the commandments of the LORD, which He had given their fathers through Moses.