Exodus 32:22-26

And Aaron said, “Do not let the anger of my lord burn; you know the people yourself, that they are prone to evil.

For they said to me, ‘Make a god for us who will go before us; for this Moses, the man who brought us up from the land of Egypt—we do not know what happened to him.’

So I said to them, ‘Whoever has any gold, let them tear it off.’ Then they gave it to me, and I threw it into the fire, and out came this calf.”

Now when Moses saw that the people were out of control—for Aaron had let them get out of control to the point of being an object of ridicule among their enemies—

Moses then stood at the gate of the camp, and said, “Whoever is for the Lord, come to me!” And all the sons of Levi gathered together to him.