1 Kings 12:31; 1 Kings 12:32

31 Jeroboam built shrines on high places and appointed priests from all sorts of people, even though they were not Levites.

32 He instituted a festival on the fifteenth day of the eighth month, like the festival held in Judah, and offered sacrifices on the altar. This he did in Bethel, sacrificing to the calves he had made. And at Bethel he also installed priests at the high places he had made.