Isaiah 21:6-9

6This is what the Lord says to me: “Go, post a lookout and have him report what he sees. 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!’ ”