Charles Spurgeon Commentary Exodus 32:25

"And when Moses saw that the people were broken loose, (for Aaron had let them loose for a derision among their enemies,)" — Exodus 32:25 (ASV)

And when Moses saw that the people were naked; (for Aaron had made them naked unto their shame among their enemies:)

Moses does not spare Aaron; he lays at his door the guilt of the great sin he had committed: Aaron had made them naked unto their shame among their enemies.