Rev 18:19

19 They cast dust on their heads, and cried, weeping and mourning, saying, ‘Woe, woe, the great city, in which all who had their ships in the sea were made rich by reason of her great wealth!’ For in one hour is she made desolate. 

ships at sea became rich by her wealth – these are also the false churches “false arks of salvation” described in Rev 8:9.