They cast dust on their heads - They showed every sign of the sincerest grief. The lamentation over this great ruined city, Revelation 18:9-19, is exceedingly strong and well drawn. Here is no dissembled sorrow; all is real to the mourners, and affecting to the spectators.
And they cast dust on their heads - A common sign of lamentation and mourning among the Orientals. See the notes on Job 2:12.
By reason of her costliness - The word rendered “costliness” - τιμιότητος timiotētos- means, properly, “preciousness, costliness”; their magnificence, costly merchandise. The luxury of a great city enriches many individuals, however much it may impoverish itself. For in one hour is she made desolate - So it seemed to them. See the notes on Revelation 18:17.