ה֛וֹי הַמַּעֲמִיקִ֥ים מֵֽיהוָ֖ה לַסְתִּ֣ר עֵצָ֑ה וְהָיָ֤ה בְמַחְשָׁךְ֙ מַֽעֲשֵׂיהֶ֔ם וַיֹּ֣אמְר֔וּ מִ֥י רֹאֵ֖נוּ וּמִ֥י יוֹדְעֵֽנוּ׃
Woe unto them that seek deep to hide their counsel from the LORD, and their works are in the dark, and they say: ‘Who seeth us? and who knoweth us?’
Find Talmudic references to Isaiah 29:15: , passages from the Talmud Bavli and Yerushalmi.