Jude 1:6-7

Living_Oracles(i) 6 Also, the angels who kept not their first estate, but left their proper habitation, he has reserved in everlasting chains, under darkness, to the judgment of the great day. 7 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.