כִּ֡י גַּם֩ לֹֽא־יֵדַ֨ע הָאָדָ֜ם אֶת־עִתּ֗וֹ כַּדָּגִים֙ שֶׁנֶּֽאֱחָזִים֙ בִּמְצוֹדָ֣ה רָעָ֔ה וְכַ֨צִּפֳּרִ֔ים הָאֲחֻז֖וֹת בַּפָּ֑ח כָּהֵ֗ם יֽוּקָשִׁים֙ בְּנֵ֣י הָֽאָדָ֔ם לְעֵ֣ת רָעָ֔ה כְּשֶׁתִּפּ֥וֹל עֲלֵיהֶ֖ם פִּתְאֹֽם׃
For man also knoweth not his time; as the fishes that are taken in an evil net, and as the birds that are caught in the snare, even so are the sons of men snared in an evil time, when it falleth suddenly upon them.
Find Talmudic references to Ecclesiastes 9:12: passages from the Talmud Bavli and Yerushalmi that cite or discuss this verse, free.