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 kabbalistic (mystical) interpretation of Isaiah 48:2: and classical mystical sources.