לֵ֣ב חָ֭כָם יַשְׂכִּ֣יל פִּ֑יהוּ וְעַל־שְׂ֝פָתָ֗יו יֹסִ֥יף לֶֽקַח׃
El corazón del sabio hace prudente su boca; Y con sus labios aumenta la doctrina.
Rashi on Proverbs
The heart of a wise man gives his mouth intelligence His heart teaches his mouth to speak lucidly.