Judges 3:1-2, 4-6

These are the nations that the LORD left in the land to test those Israelites who had not experienced the wars of Canaan. He did this to teach warfare to generations of Israelites who had no experience in battle.

These people were left to test the Israelites—to see whether they would obey the commands the LORD had given to their ancestors through Moses. So the people of Israel lived among the Canaanites, Hittites, Amorites, Perizzites, Hivites, and Jebusites, and they intermarried with them. Israelite sons married their daughters, and Israelite daughters were given in marriage to their sons. And the Israelites served their gods.