כַּאֲשֶׁ֤ר שָׁמַ֨עְנוּ ׀ כֵּ֤ן רָאִ֗ינוּ בְּעִיר־יְהוָ֣ה צְ֭בָאוֹת בְּעִ֣יר אֱלֹהֵ֑ינוּ אֱלֹ֘הִ֤ים יְכוֹנְנֶ֖הָ עַד־עוֹלָ֣ם סֶֽלָה׃
As we have heard, so have we seen In the city of the LORD of hosts, in the city of our God— God establish it for ever. Selah
Read kabbalistic (mystical) interpretation of Psalms 48:9: and classical mystical sources.