Exodus 19:12-13

12Make a line round the edge of the mountain so that the people do not cross it. Say to them, “Be careful! Do not go up the mountain or even touch the edge of it. If any people or animals touch the mountain, they must die.

13Nobody must go near them. You must throw stones at them to kill them. Or you must shoot arrows at them. You must not let them live, whether they are people or animals.” The people must wait until they hear the sound of a trumpet. When they hear a long noise, then they may go up on the mountain.’