Aaron answered them, “Take off the gold earrings that your wives, your sons and your daughters are wearing, and bring them to me.”
References for Exodus 32:2
So all the people took off their earrings and brought them to Aaron.
He took what they handed him and made it into an idol cast in the shape of a calf, fashioning it with a tool. Then they said, “These are your gods, Israel, who brought you up out of Egypt.”
References for Exodus 32:4