Exodus 32:4-6

4And 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.”

5Now 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!”

6So they got up early the next day and offered burnt offerings, and brought peace offerings; then the people sat down to eat and drink, and got up to play [shamefully—without moral restraint].