Joshua 8:18-19

18Then the Lord said to Joshua, "Stretch out the javelin that is in your hand toward Ai, for I will give it into your hand." And Joshua stretched out the javelin that was in his hand toward the city.

19And the men in the ambush rose quickly out of their place, and as soon as he had stretched out his hand, they ran and entered the city and captured it. And they hurried to set the city on fire.