רֽוֹמְמ֡וּ יְה֘וָ֤ה אֱלֹהֵ֗ינוּ וְ֭הִֽשְׁתַּחֲווּ לְהַ֣ר קָדְשׁ֑וֹ כִּֽי־קָ֝ד֗וֹשׁ יְהוָ֥ה אֱלֹהֵֽינוּ׃
Exalt ye the LORD our God, And worship at His holy hill; For the LORD our God is holy.
Read kabbalistic (mystical) interpretation of Psalms 99:9: and classical mystical sources.