Jude 1:6-7

MNT(i) 6 while the angels who did not keep their first domain but left their proper abode, are held by him in blank darkness, in everlasting chains, in preparation for the judgment of the Great Day. 7 So also Sodom and Gomorrah and the near-by cities which in like manner glutted themselves in sensuality and unnatural vice, are exhibited as a warning of the eternal fire, in the punishment they undergo.