American Standard Version
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.

Berean Study Bible
Of them the proverbs are true: “A dog returns to its vomit,” and, “A sow that is washed goes back to her wallowing in the mud.”

Douay-Rheims Bible
For, that of the true proverb has happened to them: The dog is returned to his vomit: and, The sow that was washed, to her wallowing in the mire.

English Revised Version
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.

King James Bible
But it is happened unto them according to the true proverb, The dog is turned to his own vomit again; and the sow that was washed to her wallowing in the mire.

World English Bible
But it has happened to them according to the true proverb, "The dog turns to his own vomit again," and "the sow that has washed to wallowing in the mire."

Young's Literal Translation
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 2:22 Additional Translations ...