1 Kings 12:31; 1 Kings 12:32

31 And he made houses on high places, and made priests from among all the people who were not of the sons of Levi.

32 Jeroboam instituted a feast in the eighth month on the fifteenth day of the month, like the feast which is in Judah, and he went up to the altar; thus he did in Bethel, sacrificing to the calves which he had made. And he stationed in Bethel the priests of the high places which he had made.