Jude 12-13 & 2 Pet 2:17
Jude 1:12 (NIV) These men are blemishes at your love feasts, eating with you without the slightest qualm--shepherds who feed only themselves. They are clouds without rain, blown along by the wind; autumn trees, without fruit and uprooted--twice dead.
13 They are wild waves of the sea, foaming up their shame; wandering stars, for whom blackest darkness has been reserved forever.
2Pet 2:17 (NIV) These men are springs without water and mists driven by a storm. Blackest darkness is reserved for them.