Isaiah 21:7-9

7When he sees chariots with teams of horses, riders on donkeys or riders on camels, let him be alert, fully alert.” 8And the lookout shouted, “Day after day, my lord, I stand on the watchtower; every night I stay at my post. 9Look, here comes a man in a chariot with a team of horses. And he gives back the answer: ‘Babylon has fallen, has fallen! All the images of its gods lie shattered on the ground!’ ”