Exodus 32:4-5

4Then he took the gold from their 1hands, and fashioned it with an engraving tool and made it into a 2cast metal calf; and they said, “3This is your god, Israel, who brought you up from the land of Egypt.”

5Now 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.”