2 Peter 2:20
Now, if, having fled away from the pollutions of the world, through the knowledge of the Lord and Saviour Jesus Christ, and being again entangled, they are overcome by them; their last condition is worse than the first.
2 Peter 2:22
But the saying of the true proverb has happened to them: "The dog is returned to his own vomit; and the washed hog, to its wallowing in the mire."
1 John 2:19
They went away from us, but they were not of us. For, if they had been of us, they would have abode with us; but they went away, that they might be made manifest that they were not of us.
Jude 1:12
These men are spots in love feasts, when they feast with you, feeding themselves without fear. They are clouds without water, carried about of winds: withered autumnal trees without fruit; twice dead; rooted out;