Joshua 8:7, 9, 12, 14, 19

you are to rise up from ambush and take the city. The LORD your God will give it into your hand.

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.

Joshua had taken about five thousand men and set them in ambush between Bethel and Ai, to the west of the city.

When the king of Ai saw this, he and all the men of the city hurried out early in the morning to meet Israel in battle at a certain place overlooking the Arabah. But he did not know that an ambush had been set against him behind the city.

As soon as he did this, the men in the ambush rose quickly from their position and rushed forward. They entered the city and captured it and quickly set it on fire.