הַ֥ס כָּל־בָּשָׂ֖ר מִפְּנֵ֣י יְהוָ֑ה כִּ֥י נֵע֖וֹר מִמְּע֥וֹן קָדְשֽׁוֹ׃ (ס)
Be silent, all flesh, before the LORD; for He is aroused out of His holy habitation.
Read kabbalistic (mystical) interpretation of Zechariah 2:17: and classical mystical sources.