וְי֘וֹד֤וּ שָׁמַ֣יִם פִּלְאֲךָ֣ יְהוָ֑ה אַף־אֱ֝מֽוּנָתְךָ֗ בִּקְהַ֥ל קְדֹשִֽׁים׃
So shall the heavens praise Thy wonders, O LORD, Thy faithfulness also in the assembly of the holy ones.
Read kabbalistic (mystical) interpretation of Psalms 89:6: and classical mystical sources.