Exodus 19:12-14

19:12 And thou shalt set bounds unto the people round about, saying, Take heed to yourselves, [that ye] go [not] up into the mount, or touch the border of it: whosoever toucheth the mount shall be surely put to death: 19:13 There shall not an hand touch it, but he shall surely be stoned, or shot through; whether [it be] beast or man, it shall not live: when the trumpet soundeth long, they shall come up to the mount. 19:14 And Moses went down from the mount unto the people, and sanctified the people; and they washed their clothes.