Exodus 19:17-18

Authorized (King James) Version

¹⁷ And Moses brought forth the people out of the camp to meet with God; and they stood at the nether part of the mount. ¹⁸ And mount Sinai was altogether on a smoke, because the Lord descended upon it in fire: and the smoke thereof ascended as the smoke of a furnace, and the whole mount quaked greatly.