Jude 1:5-7

5 Now I want to remind you, although you once knew this, that the Lord, having saved the people out of the land of Egypt, afterward destroyed those who did not believe.

6 And the angels who did not keep their own domain, but rather having left their own habitation, He has kept with everlasting chains under darkness for the judgment of the great day;

7 as Sodom and Gomorrah, and the cities around them in a similar manner to these, having given themselves over to fornication and having gone after other flesh, are set forth as an example, suffering the vengeance of eternal fire.