Exodus 32:1-5

Now when the people saw that Moses delayed coming down from the mountain, they gathered together before Aaron and said to him, “Come, make us a god who will go before us; as for this Moses, the man who brought us up from the land of Egypt, we do not know what has become of him.” So Aaron replied to them, “Take off the gold rings that are in the ears of your wives, your sons and daughters, and bring them to me.” So all the people took off the gold rings that were in their ears and brought them to Aaron. And he took the gold from their hands, and fashioned it with an engraving tool and made it into a molten calf; and they said, “This is your god, O Israel, who brought you up from the land of Egypt.” Now when Aaron saw the molten calf, he built an altar before it; and Aaron made a proclamation, and said, “Tomorrow shall be a feast to the LORD!”