Exodus 19:17-19

Revised Standard Version

¹⁷ Then Moses brought the people out of the camp to meet God; and they took their stand at the foot of the mountain. ¹⁸ And Mount Sinai was wrapped in smoke, because the Lord descended upon it in fire; and the smoke of it went up like the smoke of a kiln, and the whole mountain quaked greatly. ¹⁹ And as the sound of the trumpet grew louder and louder, Moses spoke, and God answered him in thunder.