בְּשִׂפְתֵ֣י נָ֭בוֹן תִּמָּצֵ֣א חָכְמָ֑ה וְ֝שֵׁ֗בֶט לְגֵ֣ו חֲסַר־לֵֽב׃
אױף די ליפּן פֿון דעם פֿאַרשטאַנדיקן געפֿינט זיך חכמה, און אַ רוט פֿאַרן רוקן פֿון דעם װאָס אָן שׂכל.
Rashi
Wisdom is found in the lips of the understanding When a person reproves an understanding individual, he replies to him, “I have sinned,” e.g. David, who said to Nathan, “I have sinned” (11 Sam. 12:13).
Rashi
but a rod is for the body of one devoid of sense But one who is devoid of sense does not listen until he is smitten, like Pharaoh.