Exodus 19:16-18

New Revised Standard Version, Anglicised Catholic Edition

¹⁶ On the morning of the third day there was thunder and lightning, as well as a thick cloud on the mountain, and a blast of a trumpet so loud that all the people who were in the camp trembled. ¹⁷ Moses brought the people out of the camp to meet God. They took their stand at the foot of the mountain. 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.