וַיֹּ֣אמֶר אֲלֵיהֶ֔ם כֹּֽה־אָמַ֥ר יְהוָ֖ה אֱלֹהֵ֣י יִשְׂרָאֵ֑ל אֲשֶׁ֨ר שְׁלַחְתֶּ֤ם אֹתִי֙ אֵלָ֔יו לְהַפִּ֥יל תְּחִנַּתְכֶ֖ם לְפָנָֽיו׃
and said unto them: ‘Thus saith the LORD, the God of Israel, unto whom ye sent me to present your supplication before Him:
Read midrashic interpretation of Jeremiah 42:9: and classical rabbinic exegesis.