2 Pet 2:22

⸀συμβέβηκεν αὐτοῖς τὸ τῆς ἀληθοῦς παροιμίας· Κύων ἐπιστρέψας ἐπὶ τὸ ἴδιον ἐξέραμα, καί· Ὗς λουσαμένη εἰς ⸀κυλισμὸν βορβόρου.

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.”