And they cast dust on their heads — As mourners. Most of the expressions here used in describing the downfall of Babylon are taken from Ezekiel's description of the downfall of Tyre, Ezekiel 26:1-28.
Related Commentaries of Revelation 18:19
Revelation 18:19
19 And they cast dust on their heads, and cried, weeping and wailing, saying, Alas, alas, that great city, wherein were made rich all that had ships in the sea by reason of her costliness! for in one hour is she made desolate.