Joshua 8:19-21

New King James Version

¹⁹ So those in ambush arose quickly out of their place; they ran as soon as he had stretched out his hand, and they entered the city and took it, and hurried to set the city on fire. ²⁰ And 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.

²¹ Now 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.