2PE 2:22

22 For that very proverb befelled to them, The hound (re)turned again to his vomit, or casting(up), and a sow is washed in wallowing in fen [[or in clay]]. (This proverb hath proven true for them, A dog returneth to its vomit, and after a pig hath washed itself, it walloweth again in the mire.)