The people saw that Moses was taking a long time to come down from the mountain. They gathered around Aaron and said to him, "Come on! Make us gods who can lead us. As for this man Moses who brought us up out of the land of Egypt, we don't have a clue what has happened to him."
References for Exodus 32:1
Aaron said to them, "All right, take out the gold rings from the ears of your wives, your sons, and your daughters, and bring them to me."
So all the people took out the gold rings from their ears and brought them to Aaron.
He collected them and tied them up in a cloth. Then he made a metal image of a bull calf, and the people declared, "These are your gods, Israel, who brought you up out of the land of Egypt!"
References for Exodus 32:4