9 The Lord said to Moses, “I will come to you in a thick cloud, so that the people will hear me speaking with you and will believe you from now on.”Moses told the Lord what the people had answered,
10 and the Lord said to him, “Go to the people and tell them to spend today and tomorrow purifying themselves for worship. They must wash their clothes
11 and be ready the day after tomorrow. On that day I will come down on Mount Sinai, where all the people can see me.
12 Mark a boundary round the mountain that the people must not cross, and tell them not to go up the mountain or even get near it. If anyone sets foot on it, he is to be put to death;
13 he must either be stoned or shot with arrows, without anyone touching him. This applies to both men and animals; they must be put to death. But when the trumpet is blown, then the people are to go up to the mountain.”
14 Then Moses came down the mountain and told the people to get ready for worship. So they washed their clothes,
15 and Moses said to them, “Be ready by the day after tomorrow and don't have sexual intercourse in the meantime.”