Moses
Exodus 32:35ESV·traditional attribution

Then the LORD sent a plague on the people, because they made the calf, the one that Aaron made.

John Calvin Reformed @genevareformer

35. And the Lord plagued the people Moses here briefly attributes to God what he had before related as to the slaughter of the three thousand, lest any should think that he had smitten them with immoderate severity Therefore Paul bids us consider in this history, as in a mirror, how greatly displeasing to God idolatry is; lest we should imitate those who were smitten by His hand.

Matthew Henry Presbyterian @wholebiblehenry

Moses, having executed justice upon the principal offenders, is here dealing both with the people and with God. I. With the people, to bring them to repentance, Exo 32:30. 1. When some were slain, lest the rest should imagine that, because they were exempt from the capital punishment, they were therefore looked upon as free from guilt, Moses here tells the survivors, You have sinned...

Commenting on Exodus 32:30-35

John Gill Reformed Baptist @doctorgill

And when the people saw that Moses delayed to come down out of the mount,.... The time, according to the Targum of Jonathan, being elapsed, which he had fixed for his descent, and through a misreckoning, as Jarchi suggests; they taking the day of his going up to be one of the forty days, at the end of which he was to return, whereas he...