Exodus 19:13

19:13 No hand will touch him – but he will surely be stoned or shot through, whether a beast or a human being; he must not live.’ When the ram’s horn sounds a long blast they may go up on the mountain.”

Exodus 29:20

29:20 and you are to kill the ram and take some of its blood and put it on the tip of the right ear of Aaron, on the tip of the right ear of his sons, on the thumb of their right hand, and on the big toe of their right foot, and then splash the blood all around on the altar.

sn There is some ambiguity here. The clause either means that no man will touch the mountain, so that if there is someone who is to be put to death he must be stoned or shot since they could not go into the mountain region to get him, or, it may mean no one is to touch the culprit who went in to the region of the mountain.

tn Heb “a man.”

tn The nuance here is permissive imperfect, “they may go up.” The ram’s horn would sound the blast to announce that the revelation period was over and it was permitted then to ascend the mountain.

sn By this ritual the priests were set apart completely to the service of God. The ear represented the organ of hearing (as in “ears you have dug” in Ps 40 or “awakens my ear” in Isa 50), and this had to be set apart to God so that they could hear the Word of God. The thumb and the hand represented the instrument to be used for all ministry, and so everything that they “put their hand to” had to be dedicated to God and appropriate for his service. The toe set the foot apart to God, meaning that the walk of the priest had to be consecrated – where he went, how he conducted himself, what life he lived, all belonged to God now.