וְרָאִ֨יתִֽי אֲנִ֜י אֶת־כָּל־עָמָ֗ל וְאֵת֙ כָּל־כִּשְׁר֣וֹן הַֽמַּעֲשֶׂ֔ה כִּ֛י הִ֥יא קִנְאַת־אִ֖ישׁ מֵרֵעֵ֑הוּ גַּם־זֶ֥ה הֶ֖בֶל וּרְע֥וּת רֽוּחַ׃
내가 또 본즉 사람이 모든 수고와 여러 가지 교묘한 일로 인하여 이웃에게 시기를 받으니 이것도 헛되어 바람을 잡으려는 것이로다
Rashi on Ecclesiastes
And I observed that all labor. These are the sins, which are toil in the eyes of the Holy One, Blessed Is He.
Rashi on Ecclesiastes
And all skillful work. Which is not for the sake of Heaven, but for one’s envy of his friend, both of which are vanity.
Rashi on Ecclesiastes
Is the result of man’s envy. Which is the result of man’s envy of his neighbor.