בְּשִׂפְתֵ֣י נָ֭בוֹן תִּמָּצֵ֣א חָכְמָ֑ה וְ֝שֵׁ֗בֶט לְגֵ֣ו חֲסַר־לֵֽב׃
En los labios del prudente se halla sabiduría: Y vara á las espaldas del falto de cordura.
Rashi on Proverbs
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 on Proverbs
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.