Exodus 19:8-15

⁸All the people answered together and said, “All that the Lord has spoken we will do!” And Moses brought back the words of the people to the Lord. ⁹The Lord said to Moses, “Behold, I will come to you in a thick cloud, so that the people may hear when I speak with you and may also believe in you forever.” Then Moses told the words of the people to the Lord.

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.”