לֵ֣ב נָ֭בוֹן יְבַקֶּשׁ־דָּ֑עַת ופני [וּפִ֥י] כְ֝סִילִ֗ים יִרְעֶ֥ה אִוֶּֽלֶת׃
The heart of him that hath discernment seeketh knowledge; But the mouth of fools feedeth on folly.
Read midrashic interpretation of Proverbs 15:14: and classical rabbinic exegesis.