Joshua 8:9; Joshua 8:29

9 Then Joshua sent them off, and they went to the place of ambush and lay in wait between Bethel and Ai, to the west of Ai—but Joshua spent that night with the people.

29 He impaled the body of the king of Ai on a pole and left it there until evening. At sunset, Joshua ordered them to take the body from the pole and throw it down at the entrance of the city gate. And they raised a large pile of rocks over it, which remains to this day.