Exodus 19:12-13

12Mark off a boundary around the mountain for the people, and tell them not to go up the mountain or even touch it. Those who touch the mountain must be put to death.

13No one should touch them. They must be stoned or shot with arrows. No matter whether it’s an animal or a person, it must not live. The people may go up the mountain ⌞only⌟ when the ram’s horn sounds a long blast.”