Psalms 135:1 Kabbalah

הַ֥לְלוּ יָ֨הּ ׀ הַֽ֭לְלוּ אֶת־שֵׁ֣ם יְהוָ֑ה הַֽ֝לְלוּ עַבְדֵ֥י יְהוָֽה׃

Hallelujah. Praise ye the name of the LORD; Give praise, O ye servants of the LORD,

Read kabbalistic (mystical) interpretation of Psalms 135:1: and classical mystical sources.