15 He told them to be ready in three days and not to have sex in the meantime.
16 On the morning of the third day there was thunder and lightning. A thick cloud covered the mountain, a loud trumpet blast was heard, and everyone in camp trembled with fear.
17 Moses led them out of the camp to meet God, and they stood at the foot of the mountain.
18 Mount Sinai was covered with smoke because the Lord had come down in a flaming fire. Smoke poured out of the mountain just like a furnace, and the whole mountain shook.
19 The trumpet blew louder and louder. Moses spoke, and God answered him with thunder.
20 The Lord came down to the top of Mount Sinai and told Moses to meet him there.
21 Then he said, “Moses, go and warn the people not to cross the boundary that you set at the foot of the mountain. They must not cross it to come and look at me, because if they do, many of them will die.