Joshua 11:13-15

However, Israel did not burn any cities that stood on their mounds, except Hazor alone, which Joshua burned. All the spoil of these cities and the cattle, the sons of Israel took as their plunder; but they struck every man with the edge of the sword, until they had destroyed them. They left no one who breathed. Just as the LORD had commanded Moses his servant, so Moses commanded Joshua, and so Joshua did; he left nothing undone of all that the LORD had commanded Moses.