Parallel
Proverbs 26:11
Westminster Leningrad Codex · Berean Standard Bible
כְּ֭כֶלֶב שָׁ֣ב עַל־ קֵא֑וֹ כְּ֝סִ֗יל שׁוֹנֶ֥ה בְאִוַּלְתּֽוֹ׃
As a dog returns to its vomit (note: Cited in 2 Peter 2:22), so a fool repeats his folly.