1 Kings 12:28, 30, 33

So on the advice of his counselors, the king made two gold calves. He said to the people, “It is too much trouble for you to worship in Jerusalem. Look, Israel, these are the gods who brought you out of Egypt!”

But this became a great sin, for the people worshiped the idols, traveling as far north as Dan to worship the one there.

So on the fifteenth day of the eighth month, a day that he himself had designated, Jeroboam offered sacrifices on the altar at Bethel. He instituted a religious festival for Israel, and he went up to the altar to burn incense.