וַיִּשְׁלַח֙ יְשַֽׁעְיָ֣הוּ בֶן־אָמ֔וֹץ אֶל־חִזְקִיָּ֖הוּ לֵאמֹ֑ר כֹּֽה־אָמַ֤ר יְהוָה֙ אֱלֹהֵ֣י יִשְׂרָאֵ֔ל אֲשֶׁר֙ הִתְפַּלַּ֣לְתָּ אֵלַ֔י אֶל־סַנְחֵרִ֖יב מֶ֥לֶךְ אַשּֽׁוּר׃
Then Isaiah the son of Amoz sent unto Hezekiah, saying: ‘Thus saith the LORD, the God of Israel: Whereas thou hast prayed to Me against Sennacherib king of Assyria,
Find Talmudic references to Isaiah 37:21: , passages from the Talmud Bavli and Yerushalmi.