"Prepare the table, watch in the watchtower, eat, drink: arise ye princes, and prepare the shield./For thus hath the Lord said unto me, Go set a watchman, let him declare what he seeth./And he saw a chariot with a couple of horsemen, a chariot of asses, and a chariot of camels; and he hearkened diligently with much heed./...And, behold, here cometh a chariot of men, with a couple of horsemen. And he answered and said, Babylon is fallen, is fallen, and all the graven images of her gods he hath broken unto the ground."
~ Book of Isaiah, Chapter 21, verses 5-9
the last stanza of Dylan's All Along the Watchtower,
All along the watchtower
Princes kept the view
While all the women came and went
Barefoot servants, too
Outside in the cold distance
A wildcat did growl
Two riders were approaching
And the wind began to howl
;-)