Once more they cried may be also rendered as “Once more the huge crowd of people cried.”
The smoke from her goes up for ever and ever: in 18.9, 18 we read of the smoke of the fire that destroys Babylon. Here the heavenly crowd celebrates the fact that the fire that consumes Babylon will never stop burning. See similar language in Isa 34.10.
Quoted with permission from Bratcher, Robert G. and Hatton, Howard A. A Handbook on The Revelation to John. (UBS Handbook Series). New York: UBS, 1993. For this and other handbooks for translators see here .