Moses
Exodus 34:3ESV·traditional attribution

No one shall come up with you, and let no one be seen throughout all the mountain. Let no flocks or herds graze opposite that mountain.”

John Calvin Reformed @genevareformer

3. And no man shall come up with thee Again men as well as beasts are prohibited from access to the mount, as had been the case at the first promulgation of the Law, in order that the people might obediently receive the Law as if come down from heaven. Why God admitted no witness, is a question the answer to which must remain with God Himself.

Matthew Henry Presbyterian @wholebiblehenry

The treaty that was on foot between God and Israel being broken off abruptly, by their worshipping the golden calf, when peace was made all must be begun anew, not where they left off, but from the beginning. Thus backsliders must repent, and do their first works, Rev 2:5. I. Moses must prepare for the renewing of the tables, Exo 34:1.

Commenting on Exodus 34:1-4

John Gill Reformed Baptist @doctorgill

And no man shall come up with thee,.... Before, Aaron and his two sons, and the seventy elders of Israel, went up with Moses, though they did not go so near the Lord as he did; but now having sinned in the matter of the golden calf, though a reconciliation was made, they were not allowed to go with him, nor even Joshua his servant...