Isaiah 21:7-9

7He will see chariots, pairs of horsemen, riders on donkeys, and riders on camels. Let him watch carefully, very carefully.

8The watchman  called, “Sir, I stand on the watchtower every day. Every night, I stand guard at my post.

9Look! Here come chariots and horsemen in pairs.” Then he said, “Babylon has fallen! It has fallen! All the idols they worship lie shattered on the ground.”