Isaiah 21:7-9

7He should look for chariots drawn by pairs of horses, and for riders on donkeys and camels. Let the watchman be fully alert.”

8Then the watchman called out, “Day after day I have stood on the watchtower, my lord. Night after night I have remained at my post.

9Now at last—look! Here comes a man in a chariot with a pair of horses!” Then the watchman said, “Babylon is fallen, fallen! All the idols of Babylon lie broken on the ground!”