Beloved, when I gave all diligence to write unto you of the common salvation, it was needful for me to write unto you, to exhort you, that ye should continually labour in the faith, which was once given unto the saints.

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.

Woe to them! For they went the way of Cain, and gave themselves up to the error of Balaam for reward, and perished in the gainsaying of Korah.