'Sodom and Gomorrah' in the Bible

and having reduced to ashes the cities of Sodom and Gomorrah, punished them with an overthrow, making them an example to those who should afterward live ungodly:

Likewise Sodom and Gomorrah, and the cities around them, which, after their example, had habitually committed uncleanness, and gone after other flesh, are set forth an example, suffering the punishment of an eternal fire.