These are the effects of great earthquakes: see Revelation 6:14. Some, by islands and mountians, understand the inhabitants of both. I know not whether those reverend authors, who by this term understand their idol worship and superstition, or ecclesiastical dignities, (I suppose because the heathens, and Jews, in imitation of them, committed idolatry on mountains and high hills), be not here too critical.
Related Commentaries of Revelation 16:20
Revelation 16:20
20 And every island fled away, and the mountains were not found.