Exodus 19:12-14

Complete Jewish Bible

¹² You are to set limits for the people all around; and say, ‘Be careful not to go up on the mountain or even touch its base; whoever touches the mountain will surely be put to death. ¹³ No hand is to touch him; for he must be stoned or shot by arrows; neither animal nor human will be allowed to live.’ When the shofar sounds, they may go up on the mountain.”

(S: vi) ¹⁴ Moshe went down from the mountain to the people and separated the people for God, and they washed their clothing.