Isaiah 21:5

2 A stern vision is told to me; the traitor betrays, and the destroyer destroys. Go up, O Elam; lay siege, O Media; all the sighing she has caused I bring to an end. 3 Therefore my loins are filled with anguish; pangs have seized me, like the pangs of a woman in labor; I am bowed down so that I cannot hear; I am dismayed so that I cannot see. 4 My heart staggers; horror has appalled me; the twilight I longed for has been turned for me into trembling. 5 They prepare the table, they spread the rugs, they eat, they drink. Arise, O princes; oil the shield! 6 For thus the Lord said to me: “Go, set a watchman; let him announce what he sees. 7 When he sees riders, horsemen in pairs, riders on donkeys, riders on camels, let him listen diligently, very diligently.” 8 Then he who saw cried out: “Upon a watchtower I stand, O Lord, continually by day, and at my post I am stationed whole nights.