Exodus 19:18-20

New Revised Standard Version, Anglicised

¹⁸ Now Mount Sinai was wrapped in smoke, because the Lord had descended upon it in fire; the smoke went up like the smoke of a kiln, while the whole mountain shook violently. ¹⁹ As the blast of the trumpet grew louder and louder, Moses would speak and God would answer him in thunder. ²⁰ When the Lord descended upon Mount Sinai, to the top of the mountain, the Lord summoned Moses to the top of the mountain, and Moses went up.