Exodus 19:7-25

So Moses called for the elders of the people, and told them all these words which the LORD commanded him. All the people answered together and said, “We will do everything that the LORD has spoken.” And Moses reported the words of the people to the LORD. The 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 believe and trust in you forever.” Then Moses repeated the words of the people to the LORD. The LORD also said to Moses, “Go to the people and consecrate them today and tomorrow [that is, prepare them for My sacred purpose], and have them wash their clothes and be ready by the third day, because on the third day the LORD will come down on Mount Sinai [in the cloud] in the sight of all the people. You shall set barriers for the people all around [the mountain], saying, ‘Beware that you do not go up on the mountain or touch its border; whoever touches the mountain must be put to death. No hand shall touch him [that is, no one shall try to save the guilty party], but the offender must be stoned or shot through [with arrows]; whether man or animal [that touches the mountain], he shall not live.’ When the ram’s horn sounds a long blast, they shall come up to the mountain.” [Num 24:8] So Moses went down from the mountain to the people and sanctified them [for God’s sacred purpose], and they washed their clothes. He said to the people, “Be prepared for the third day; do not be intimate with a woman.” So it happened on the third day, when it was morning, that there were thunder and flashes of lightning, and a thick cloud was on the mountain, and a very loud blast was sounded on a ram’s horn, so that all the people who were in the camp trembled. Then Moses brought the people out of the camp to meet God, and they stood and presented themselves at the foot of the mountain. ORD Mount Sinai was wrapped in smoke because the LORD descended upon it in fire; its smoke ascended like the smoke of a furnace, and the whole mountain quaked violently. And it happened, as the blast of the ram’s horn grew louder and louder, Moses spoke and God answered him with [a voice of] thunder. [Deut 4:12] The LORD came down on Mount Sinai, to the top of the mountain; and the LORD called Moses to the top of the mountain, and he went up. Then the LORD spoke to Moses, “Go down, warn the people, so that they do not break through [the barriers around the mountain] to the LORD to see [Me], and many of them perish [as a result]. Also have the priests who approach the LORD consecrate (sanctify, set apart) themselves [for My sacred purpose], or else the LORD will break forth [in judgment] against them [and destroy them].” Moses said to the LORD, “The people cannot come up to Mount Sinai, because You warned us, saying, ‘Set barriers around the mountain and consecrate it.’ ” Then the LORD said to him, “Go down and come up again, you and Aaron with you; but do not let the priests and the people break through [the barriers] to come up to the LORD, or He will break forth [in judgment] against them [and destroy them].” So Moses went down to the people and told them [again about God’s warning].