Joshua 11:20-21

For it was of the LORD to harden their hearts, to meet Israel in battle in order that he might utterly destroy them, that they might receive no mercy, but that he might destroy them, just as the LORD had commanded Moses. Then Joshua came at that time and cut off the Anakim from the hill country, from Hebron, from Debir, from Anab and from all the hill country of Judah and from all the hill country of Israel. Joshua utterly destroyed them with their cities.