The fall of Babylon being fixed, finished, and declared to be irrecoverable in the foregoing chapter, this begins with a holy triumph over her, in pursuance of the order given forth: Rejoice over her, thou heaven, and you holy apostles and prophets, Rev 18:20. They now gladly answer the call; and here you have, 1. The form of their thanksgiving, in that heavenly and most comprehensive word, Alleluia, praise you the Lord: with this they begin, with this they go on, and with this they end (Rev 19:4); their prayers are now turned into praises, their hosannas end in halleluias. 2. The matter of their thanksgiving: they praise him for the truth of his word, and the righteousness of his providential conduct, especially in this great event - the ruin of Babylon, which had been a mother, nurse, and nest of idolatry, lewdness, and cruelty (Rev 19:2), for which signal example of divine justice they ascribe salvation, and glory, and honour, and power, unto our God. 3. The effect of these their praises: when the angels and saints cried Alleluia, her fire burned more fiercely and her smoke ascended for ever and ever, Rev 19:3. The surest way to have our deliverances continued and completed is to give God the glory of what he has done for us. Praising God for what we have is praying in the most effectual manner for what is yet further to be done for us; the praises of the saints blow up the fire of God's wrath against the common enemy. 4. The blessed harmony between the angels and the saints in this triumphant song, Rev 19:4. The churches and their ministers take the melodious sound from the angels, and repeat it; falling down, and worshipping God, they cry, Amen, Alleluia.

Her smoke rose up - There was, and shall be, a continual evidence of God's judgments executed on this great whore or idolatrous city; nor shall it ever be restored.

And again they said, Alleluia,.... Or a "second time" they said it; they began and ended their solemn worship and service with it; so some psalms begin and end with this word, translated in the Old Testament by the words "Praise ye the LORD", as in Psa 106:1 &c. and the repeating of the word shows how hearty, arnest, and constant they were in the work of praise on this account:

and her smoke rose up for ever and ever; they repeated their hallelujah, or gave one spiritual "huzza" more at the burning of Rome, and this followed: or the words may be rendered, "for her smoke rose", &c. and so are a reason for the second "hallelujah": it looks as if Rome, like another Sodom and Gomorrah, would sink into a sulphurous burning lake, and continue so: respect is had to the everlasting punishment of antichrist and his followers in hell, and to the everlasting burnings that will follow Rome's temporal destruction, which was an example and symbol of the vengeance of eternal fire; see Rev 14:11 so the Jews (o) say of the burning of Rome, that its fire shall not be quenched for ever, and that "its smoke shall rise up for".

(o) Yalkut Simeoni, par. 2. fol. 48. 2.

again--Greek, "a second time."

rose up--Greek, "goeth up."

for ever and ever--Greek, "to the ages of the ages."