1 Kings 12:28, 30, 33

So the king consulted, and made two golden calves, and he said to them, “It is too much for you to go up to Jerusalem; behold your gods, O Israel, that brought you up from the land of Egypt.”

Now this thing became a sin, for the people went to worship before the one as far as Dan.

Then he went up to the altar which he had made in Bethel on the fifteenth day in the eighth month, even in the month which he had devised in his own heart; and he instituted a feast for the sons of Israel and went up to the altar to burn incense.