2 Peter 2:12-14, 22

But these, as creatures without reason, born mere animals to be taken and destroyed, railing in matters whereof they are ignorant, shall in their destroying surely be destroyed, suffering wrong as the hire of wrong-doing; men that count it pleasure to revel in the day-time, spots and blemishes, revelling in their deceivings while they feast with you; having eyes full of adultery, and that cannot cease from sin; enticing unstedfast souls; having a heart exercised in covetousness; children of cursing

It has happened unto them according to the true proverb, The dog turning to his own vomit again, and the sow that had washed to wallowing in the mire.