King James Version (KJV)
The heart of the wise teacheth his mouth, and addeth learning to his lips.
Modern English
The heart of the wise makes his speech judicious and adds persuasiveness to his lips.
Hebrew
לֵ֣ב חָ֭כָם יַשְׂכִּ֣יל פִּ֑יהוּ וְעַל שְׂ֝פָתָ֗יו יֹסִ֥יף לֶֽקַח׃
leb ḥakam yashkiyl piyhv vʿal shpatayv yosiyf leqaḥ