אֶת־הַכֹּ֥ל עָשָׂ֖ה יָפֶ֣ה בְעִתּ֑וֹ גַּ֤ם אֶת־הָעֹלָם֙ נָתַ֣ן בְּלִבָּ֔ם מִבְּלִ֞י אֲשֶׁ֧ר לֹא־יִמְצָ֣א הָאָדָ֗ם אֶת־הַֽמַּעֲשֶׂ֛ה אֲשֶׁר־עָשָׂ֥ה הָאֱלֹהִ֖ים מֵרֹ֥אשׁ וְעַד־סֽוֹף׃
He hath made every thing beautiful in its time; also He hath set the world in their heart, yet so that man cannot find out the work that God hath done from the beginning even to the end.
Find Talmudic references to Ecclesiastes 3:11: , passages from the Talmud Bavli and Yerushalmi.