2 Peter 2:20-22

Godbey(i) 20 For if having escaped the pollutions of the world through the perfect knowledge of our Lord and Saviour Jesus Christ, and having again become entangled in these things, they are overcome, the last state has to them become worse than the first. 21 For it was better for them not to have known the way of righteousness, than, having known it, to turn away from the holy commandment which has been delivered unto them. 22 It has happened unto them according to the old proverb, The dog having returned to his own vomit; and the sow that had washed to wallowing in the mire.