Joshua 8:12-16

Then he took about five thousand men and set them in ambush between Bethel and Ai, on the west side of the city.

So they stationed the people, all the army that was on the north side of the city, and its rear guard on the west side of the city, and Joshua spent that night in the midst of the valley.

And it came about, when the king of Ai saw them, that the men of the city hurried and got up early, and went out to meet Israel in battle, he and all his people at the appointed place before the desert plain. But he did not know that there was an ambush against him behind the city.

Then Joshua and all Israel pretended to be defeated before them, and fled by the way of the wilderness.

And all the people who were in the city were called together to pursue them, and they pursued Joshua and were lured away from the city.