וְאַל־יַבְטַ֨ח אֶתְכֶ֤ם חִזְקִיָּ֙הוּ֙ אֶל־יְהוָ֣ה לֵאמֹ֔ר הַצֵּ֥ל יַצִּילֵ֖נוּ יְהוָ֑ה וְלֹ֤א תִנָּתֵן֙ אֶת־הָעִ֣יר הַזֹּ֔את בְּיַ֖ד מֶ֥לֶךְ אַשּֽׁוּר׃
neither let Hezekiah make you trust in the LORD, saying: The LORD will surely deliver us, and this city shall not be given into the hand of the king of Assyria.
Read halakhic rulings (Jewish law) on II Kings 18:30: and classical halakhic sources.