Exodus 19:15-17 Common English Bible (CEB)
15 He told the men, “Prepare yourselves for three days. Don’t go near a woman.”
16 When morning dawned on the third day, there was thunder, lightning, and a thick cloud on the mountain, and a very loud blast of a horn. All the people in the camp shook with fear. 17 Moses brought the people out of the camp to meet God, and they took their place at the foot of the mountain.