The earth shook, the heavens also dropped at the presence of God: [even] Sinai itself [was moved] at the presence of God, the God of Israel.
Jewish Publication Society of America Version (JPS1917) - Psalms 68:8 >(68-9) The earth trembled, the heavens also dropped at the presence of God; even yon Sinai trembled at the presence of God, the God of Israel.