...Jethro, the priest of Midian and father-in-law of Moses, heard of everything God had done for Moses and for his people Israel, and how the LORD had brought Israel out of Egypt.
Moses told his father-in-law about everything the LORD had done to Pharaoh and the Egyptians for Israel's sake and about all the hardships they had met along the way and how the LORD had saved them.
Jethro was delighted to hear about all the good things the LORD had done for Israel in rescuing them from the hand of the Egyptians. He said, "Praise be to the LORD, who rescued you from the hand of the Egyptians and of Pharaoh, and who rescued the people from the hand of the Egyptians.
The next day Moses took his seat to serve as judge for the people, and they stood around him from morning till evening.
The LORD said to Moses, "I am going to come to you in a dense cloud, so that the people will hear me speaking with you and will always put their trust in you." Then Moses told the LORD what the people had said.
And the LORD said to Moses, "Go to the people and consecrate them today and tomorrow. Have them wash their clothes and be ready by the third day, because on that day the LORD will come down on Mount Sinai in the sight of all the people. Put limits for the people around the mountain and tell them, 'Be careful that you do not go up the mountain or touch the foot of it. Whoever touches the mountain shall surely be put to death. He shall surely be stoned or shot with arrows; not a hand is to be laid on him. Whether man or animal, he shall not be permitted to live.' Only when the ram's horn sounds a long blast may they go up to the mountain."
After Moses had gone down the mountain to the people, he consecrated them, and they washed their clothes. Then he said to the people, "Prepare yourselves for the third day. Abstain from sexual relations."
On the morning of the third day there was thunder and lightning, with a thick cloud over the mountain, and a very loud trumpet blast. Everyone in the camp trembled. Then Moses led the people out of the camp to meet with God, and they stood at the foot of the mountain. Mount Sinai was covered with smoke, because the LORD descended on it in fire. The smoke billowed up from it like smoke from a furnace, the whole mountain trembled violently, and the sound of the trumpet grew louder and louder.