King James Version
And Joshua at that time turned back, and took Hazor, and smote the king thereof with the sword: for Hazor beforetime was the head of all those kingdoms.English Standard Version
And Joshua turned back at that time and captured Hazor and struck its king with the sword, for Hazor formerly was the head of all those kingdoms.New International Version
At that time Joshua turned back and captured Hazor and put its king to the sword. (Hazor had been the head of all these kingdoms.)