וַיֹּ֗אמֶר לָאִישׁ֙ לְב֣וּשׁ הַבַּדִּ֔ים אֲשֶׁ֥ר מִמַּ֖עַל לְמֵימֵ֣י הַיְאֹ֑ר עַד־מָתַ֖י קֵ֥ץ הַפְּלָאֽוֹת׃
And one said to the man clothed in linen, who was above the waters of the river: ‘How long shall it be to the end of the wonders?’
Read midrashic interpretation of Daniel 12:6: and classical rabbinic exegesis.