2 Peter 2:20-22

20For if after having escaped the pollutions of the world through [the] knowledge of the Lord and Saviour Jesus Christ, again entangled, they are subdued by these, their last state is worse than the first. 21For it were better for them not to have known the way of righteousness, than having known [it] to turn back from the holy commandment delivered to them. 22But that [word] of the true proverb has happened to them: [The] dog [has] turned back to his own vomit; and, [The] washed sow to [her] rolling in mud.