כִּֽי־מֵעִ֤יר הַקֹּ֙דֶשׁ֙ נִקְרָ֔אוּ וְעַל־אֱלֹהֵ֥י יִשְׂרָאֵ֖ל נִסְמָ֑כוּ יְהוָ֥ה צְבָא֖וֹת שְׁמֽוֹ׃ (ס)
For they call themselves of the holy city, And stay themselves upon the God of Israel, The LORD of hosts is His name.
Read Jewish philosophy on Isaiah 48:2: Rambam's Guide for the Perplexed, Saadia Gaon, and classical Jewish philosophical sources, free online.