Joshua 11:10 in the 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.
Context
9 Joshua did to them as the LORD told him. He hamstrung their horses and burned their chariots with fire.
10 Joshua turned back at that time, and took Hazor, and struck its king with the sword; for Hazor used to be the head of all those kingdoms.
11 They struck all the souls who were in it with the edge of the sword, utterly destroying them. There was no one left who breathed. He burned Hazor with fire.