לְשׁ֣וֹן חֲ֭כָמִים תֵּיטִ֣יב דָּ֑עַת וּפִ֥י כְ֝סִילִ֗ים יַבִּ֥יעַ אִוֶּֽלֶת׃
The tongue of the wise useth knowledge aright; But the mouth of fools poureth out foolishness.
Read midrashic interpretation of Proverbs 15:2: and classical rabbinic exegesis.