For her sins are piled up to heaven, and God has remembered her iniquities.
The downfall and destruction of Babylon form an event so fully determined in the counsels of God, and of such consequence to his interests and glory, that the visions and predictions concerning it are repeated. 1. Here is another angel sent from heaven, attended with great power and lustre, Rev 18:1.
Commenting on Revelation 18:1-8
For her sins have reached unto heaven,.... Or "have followed unto heaven"; one after another, in one age after another, until they have been as it were heaped up together, and have reached the heavens; the phrase denotes the multitude of them, God's knowledge and notice of them, and the cry of them to him; see Gen 18:20 the Alexandrian copy and Complutensian edition read...
Verse 5. For her sins have reached unto heaven. So in , speaking of Babylon, it is said, "For her judgment reacheth unto heaven, and is lifted up even to the skies." The meaning is not that the sins of this mystical Babylon were like a mass or pile so high as to reach to heaven, but that it had become so prominent as to attract the attention of God.