17 The seventh angel poured out his bowl into the air, and out of the temple came a loud voice from the throne, saying, "It is done!" 18 Then there came flashes of lightning, rumblings, peals of thunder and a severe earthquake. No earthquake like it has ever occurred since mankind has been on earth, so tremendous was the quake. 19 The great city split into three parts, and the cities of the nations collapsed. God remembered Babylon the Great and gave her the cup filled with the wine of the fury of his wrath. 20 Every island fled away and the mountains could not be found. 21 From the sky huge hailstones, each weighing about a hundred pounds,[1] fell on people. And they cursed God on account of the plague of hail, because the plague was so terrible.

Matthew Henry's Commentary on Revelation 16:17-21

Commentary on Revelation 16:17-21

(Read Revelation 16:17-21)

The seventh and last angel poured forth his vial, and the downfal of Babylon was finished. The church triumphant in heaven saw it and rejoiced; the church in conflict on earth saw it and became triumphant. God remembered the great and wicked city; though for some time he seemed to have forgotten her idolatry and cruelty. All that was most secure was carried away by the ruin. Men blasphemed: the greatest judgments that can befal men, will not bring to repentance without the grace of God. To be hardened against God, by his righteous judgments, is a certain token of sure and utter destruction.