1 Kings 12:31-33

New Revised Standard Version, Anglicised

³¹ He also made houses^[a] on high places, and appointed priests from among all the people, who were not Levites. ³² Jeroboam appointed a festival on the fifteenth day of the eighth month like the festival that was in Judah, and he offered sacrifices on the altar; so he did in Bethel, sacrificing to the calves that he had made. And he placed in Bethel the priests of the high places that he had made. ³³ He went up to the altar that he had made in Bethel on the fifteenth day in the eighth month, in the month that he alone had prescribed; he appointed a festival for the people of Israel, and he went up to the altar to offer incense.