אִ֣ישׁ תּ֭וֹכָחוֹת מַקְשֶׁה־עֹ֑רֶף פֶּ֥תַע יִ֝שָּׁבֵ֗ר וְאֵ֣ין מַרְפֵּֽא׃
He that being often reproved hardeneth his neck Shall suddenly be broken, and that without remedy.
Read midrashic interpretation of Proverbs 29:1: and classical rabbinic exegesis.