Joshua 8:18-22

Then the LORD said to Joshua, “Stretch out the spear that is in your hand toward Ai, for I will give it into your hand.” And Joshua stretched out the spear that was in his hand toward the city. 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. 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. 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. Then 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.