Exodus 32:5-9

Now when Aaron saw this, he built an altar in front of it; and Aaron made a proclamation and said, “Tomorrow shall be a feast to the Lord.”

So the next day they got up early and offered burnt offerings, and brought peace offerings; and the people sat down to eat and to drink, and got up to engage in lewd behavior.

Then the Lord spoke to Moses, “Go down at once, for your people, whom you brought up from the land of Egypt, have behaved corruptly.

They have quickly turned aside from the way which I commanded them. They have made for themselves a cast metal calf, and have worshiped it and have sacrificed to it and said, ‘This is your god, Israel, who brought you up from the land of Egypt!’ ”

Then the Lord said to Moses, “I have seen this people, and behold, they are an obstinate people.