2 Peter 2:17-22

These are waterless springs and mists driven by a storm; for them the nether gloom of darkness has been reserved. For, uttering loud boasts of folly, they entice with licentious passions of the flesh men who have barely escaped from those who live in error. They promise them freedom, but they themselves are slaves of corruption; for whatever overcomes a man, to that he is enslaved. For if, after they have escaped the defilements of the world through the knowledge of our Lord and Savior Jesus Christ, they are again entangled in them and overpowered, the last state has become worse for them than the first. For it would have been better for them never to have known the way of righteousness than after knowing it to turn back from the holy commandment delivered to them. It has happened to them according to the true proverb. The dog turns back to his own vomit, and the sow is washed only to wallow in the mire.