1 Kings 12:30-32

New Century Version

³⁰ This became a very great sin, because the people traveled as far as Dan to worship the calf there.

³¹ Jeroboam built temples on the places of worship. He also chose priests from all the people, not just from the tribe of Levi. ³² And he started a new festival on the fifteenth day of the eighth month, just like the festival in Judah. During that time the king offered sacrifices on the altar, along with sacrifices to the calves in Bethel he had made. He also chose priests in Bethel to serve at the places of worship he had made.