Exodus 32:4-7

He took this from their hand, and fashioned it with a graving 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 this, he built an altar before it; and Aaron made a proclamation and said, “Tomorrow shall be a feast to the LORD.” So the next day they rose early and offered burnt offerings, and brought peace offerings; and the people sat down to eat and to drink, and rose up to play. Then the LORD spoke to Moses, “Go down at once, for your people, whom you brought up from the land of Egypt, have corrupted themselves.