Joshua 8:20-24

20When the men of Ai turned back and looked, behold, the smoke of the city was ascending toward the sky, and they had no opportunity to run this way or that way. Then the people who had been running to the wilderness turned back toward the pursuers.

21When Joshua and all Israel saw that the [men in] ambush had taken the city and that the smoke of the city was ascending, they turned back and struck down the men of Ai.

22Then the others came out of the city to confront the men of Ai [as they returned], so that they were trapped in the midst of Israel, some on this side and some on that side; then Israel struck them until none of them survived or escaped.

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

24When Israel had finished killing all the inhabitants of Ai in the field in the wilderness where they pursued them, and they had all fallen by the edge of the sword until they were destroyed, then all Israel returned to Ai and struck it with the edge of the sword.