Joshua 8:20-24

20And when the men of Ai looked behind them, they saw, and behold, the smoke of the city ascended to heaven. So they had no power to flee this way or that way, and the people who had fled to the wilderness turned back on the pursuers.

21Now when Joshua and all Israel saw that the ambush had taken the city and that the smoke of the city ascended, they turned back and struck down the men of Ai.

22Then the others came out of the city against them; so they were caught in the midst of Israel, some on this side and some on that side. And they struck them down, so that they let none of them remain or escape.

23But the king of Ai they took alive, and brought him to Joshua.

24And it came to pass when Israel had made an end of slaying all the inhabitants of Ai in the field, in the wilderness where they pursued them, and when they all had fallen by the edge of the sword until they were consumed, that all the Israelites returned to Ai and struck it with the edge of the sword.