Joshua 8:28-29

28So Joshua burned the town of Ai, and it became a permanent mound of ruins, desolate to this very day.

29Joshua impaled the king of Ai on a sharpened pole and left him there until evening. At sunset the Israelites took down the body, as Joshua commanded, and threw it in front of the town gate. They piled a great heap of stones over him that can still be seen today.