מָ֤ה אֶֽעֱשֶׂה־לְּךָ֙ אֶפְרַ֔יִם מָ֥ה אֶעֱשֶׂה־לְּךָ֖ יְהוּדָ֑ה וְחַסְדְּכֶם֙ כַּֽעֲנַן־בֹּ֔קֶר וְכַטַּ֖ל מַשְׁכִּ֥ים הֹלֵֽךְ׃
O Ephraim, what shall I do unto thee? O Judah, what shall I do unto thee? For your goodness is as a morning cloud, And as the dew that early passeth away.
Read midrashic interpretation of Hosea 6:4: and classical rabbinic exegesis.