TSK
Treasury of Scripture Knowledge references in NET.
You must set boundaries for the people all around, saying,‘Take heed to yourselves not to go up on the mountain nor touch its edge. Whoever touches the mountain will surely be put to death!
So you are to appoint Aaron and his sons, and they will be responsible for their priesthood, but the unauthorized person who comes near must be put to death.”
You must surround the king. Each of you must hold his weapon in his hand. Whoever approaches your ranks must be killed. You must accompany the king wherever he goes.”