Jude 1:5-7

Now I want to remind you, although you are fully informed once for all, that the Lord, after saving a people out of the land of Egypt, subsequently destroyed those who did not believe [who refused to trust and obey and rely on Him]. [Num 14:27-37] And angels who did not keep their own designated place of power, but abandoned their proper dwelling place, [these] He has kept in eternal chains under [the thick gloom of utter] darkness for the judgment of the great day, just as Sodom and Gomorrah and the adjacent cities, since they in the same way as these angels indulged in gross immoral freedom and unnatural vice and sensual perversity. They are exhibited [in plain sight] as an example in undergoing the punishment of everlasting fire. [Gen 19:1-29]