(Ex. 32 is a chapter where the children of Israel are up to no good. Aaron says they tend to get into mischief. It says at one point that Moses's anger waxed hot. A few verses down he asks the big question. "Who is on the Lord's side?" Those who were, were asked to gather themselves (vs 26).
I like how Moses asked "who's on the Lords side?", and didn't ask who was on his side. At a crucial moment it kept the focus on the Lord, and not on himself. To me a sign of a true messenger.
But what a stinging question he asked applicable to everyone at any moment since we have all been warned there is idolatry and mischief in our own day.
The Lord says "Come unto me". We have been invited to be on the Lord's side and gather ourselves around Him. Hopefully we hear and respond to it.