Exodus 19:10-17

¹⁰The Lord also said to Moses, “Go to the people and consecrate them today and tomorrow, and let them wash their garments; ¹¹and let them be ready for the third day, for on the third day the Lord will come down on Mount Sinai in the sight of all the people. ¹²You shall set bounds for the people all around, saying, ‘Beware that you do not go up on the mountain or touch the border of it; whoever touches the mountain shall surely be put to death. ¹³No hand shall touch him, but he shall surely be stoned or shot through; whether beast or man, he shall not live.’ When the ram’s horn sounds a long blast, they shall come up to the mountain.” ¹⁴So Moses went down from the mountain to the people and consecrated the people, and they washed their garments. ¹⁵He said to the people, “Be ready for the third day; do not go near a woman.”

¹⁶So it came about on the third day, when it was morning, that there were thunder and lightning flashes and a thick cloud upon the mountain and a very loud trumpet sound, so that all the people who were in the camp trembled. ¹⁷And Moses brought the people out of the camp to meet God, and they stood at the foot of the mountain.