2 Peter 2:21-22 Young's Literal Translation Of The Holy Bible (YLT98)

21. for it were better to them not to have acknowledged the way of the righteousness, than having acknowledged [it], to turn back from the holy command delivered to them,

22. and happened to them hath that of the true similitude; `A dog did turn back upon his own vomit,' and, `A sow having bathed herself--to rolling in mire.'

2 Peter 2