בְּֽ֭מַקְהֵלוֹת בָּרְכ֣וּ אֱלֹהִ֑ים יְ֝הוָ֗ה מִמְּק֥וֹר יִשְׂרָאֵֽל׃
'Bless ye God in full assemblies, Even the Lord, ye that are from the fountain of Israel.'
Read kabbalistic (mystical) interpretation of Psalms 68:27: and classical mystical sources.