רָאִ֙יתִי֙ אֶת־כָּל־הַֽמַּעֲשִׂ֔ים שֶֽׁנַּעֲשׂ֖וּ תַּ֣חַת הַשָּׁ֑מֶשׁ וְהִנֵּ֥ה הַכֹּ֛ל הֶ֖בֶל וּרְע֥וּת רֽוּחַ׃
I have seen all the works that are done under the sun; and, behold, all is vanity and a striving after wind.
Read halakhic rulings (Jewish law) on Ecclesiastes 1:14: and classical halakhic sources.