Revelation 16:19

And the great city was divided into three parts, and the cities of the Gentiles fell down. And Babylon the great came into remembrance before God, to give her the cup of the wine of his fiercest wrath.

Revelation 18:4-6

And I heard another voice from heaven, saying, Come out from her, my people, that you may not be partakers with her in her sins, and that you may not partake of her plagues:

Treasury of Scripture Knowledge

Summary

Flee out of the midst of Babylon, and deliver every man his soul: be not cut off in her iniquity; for this is the time of the LORD'S vengeance; he will render unto her a recompence.

Bible References

For this

Revelation 16:19
And the great city was divided into three parts, and the cities of the Gentiles fell down. And Babylon the great came into remembrance before God, to give her the cup of the wine of his fiercest wrath.
Revelation 18:5
for her sins have followed up to heaven, and her unrighteous actions are come up in remembrance before God.