זִמַּ֣ת אִוֶּ֣לֶת חַטָּ֑את וְתוֹעֲבַ֖ת לְאָדָ֣ם לֵֽץ׃
The thought of foolishness is sin; And the scorner is an abomination to men.
Rashi on Proverbs
The counsel of folly Heb. זמת אולת, the counsel of folly is sin for those who perpetrate it.
Rashi on Proverbs
and what makes man an abomination is scorn Scorn is what makes man an abomination to the Holy One blessed be He, and to people.