Revelation 14:8

And another, a second angel followed, crying, "Fallen, fallen is Babylon the great, who made all nations drink the wine of the passion of her vice!"

Revelation 18:2

and he shouted aloud with a strong voice, "Fallen, fallen is Babylon the great, now she is a haunt of demons, the den of all foul spirits, a cage for every foul and loathsome bird:

Revelation 18:8-11

so shall her plagues fall in a single day, pestilence, tears, and famine: she shall be burnt with fire ??for strong is God the Lord her judge.

Revelation 18:17-19

And all this splendour gone in one brief hour!' And all shipmasters and sea-faring folk, sailors and all whose business lies upon the sea, stood far off

Treasury of Scripture Knowledge

Summary

Babylon is suddenly fallen and destroyed: howl for her; take balm for her pain, if so be she may be healed.

Bible References

Suddenly

Revelation 14:8
And another, a second angel followed, crying, "Fallen, fallen is Babylon the great, who made all nations drink the wine of the passion of her vice!"
Revelation 18:2
and he shouted aloud with a strong voice, "Fallen, fallen is Babylon the great, now she is a haunt of demons, the den of all foul spirits, a cage for every foul and loathsome bird: