And I said unto them, Whosoever hath any gold, let them break it off. So they gave it me: then I cast it into the fire, and there came out this calf.
Moses begins with Aaron, not ordering his death like the ringleaders, because there is a world of difference between those who rush headlong into sin and those surprised by infirmity into it. Aaron deserved to be cut off, and would have been, except Moses interceded for him; now he calls him to repentance, showing him he hardened their hearts and strengthened their hands in idolatry.
AI summary
Commenting on Exodus 32:21-29
And when Moses saw that the people were naked,.... Not in their bodies, being stripped of their ear rings; for parting with them was not sufficient to denominate them naked in a corporeal sense; nor as being without their armour, which was laid aside while they were eating, and drinking, and dancing about the calf, and so might be thought a proper opportunity for the...
I cast it into the fire and there came out this calf - What a silly and ridiculous subterfuge! He seems to insinuate that he only threw the metal into the fire, and that the calf came unexpectedly out by mere accident.