1 Kings 12:31-32

31And 1he made houses on high places, and 2made priests from among 3all the people who were not of the sons of Levi.

32Jeroboam 4instituted a feast in the eighth month on the fifteenth day of the month, 5like the feast which is in Judah, and he 6went up to the altar; thus he did in Bethel, sacrificing to the calves which he had made. And he stationed in Bethel 7the priests of the high places which he had made.