2 Peter 2:6
He reduced to ashes the cities of Sodom and Gomorrah, and condemned them to overthrow, making them an example to people who might in future be living godless lives.
Jude 1:7
So also Sodom and Gomorrah--and the neighboring towns in the same manner--having been guilty of gross fornication and having gone astray in pursuit of unnatural vice, are now before us as a specimen of the fire of the Ages in the punishment which they are undergoing.
Revelation 18:21-23
Then a single angel of great strength took a stone which resembled a huge millstone, and hurled it into the sea, saying, "So shall Babylon, that great city, be violently hurled down and never again be found.