Exodus 32:5
5 When Aaron saw this, he built an altar before it. And Aaron bmade a proclamation and said, “Tomorrow shall be a feast to the Lord.”
Exodus 32:8
8 They have turned aside quickly out of the way that gI commanded them. They have made for themselves a golden calf and have worshiped it and sacrificed to it and said, ‘These are your gods, O Israel, who brought you up out of the land of Egypt!’”