1 Kings 12:28, 30, 33

So the king took counsel [and followed bad advice] and made two calves of gold. And he said to the people, “It is too much for you to go [all the way] up to Jerusalem; behold your gods, O Israel, who brought you up out of the land of Egypt.”

Now this thing became a sin [for Israel]; because the people went to worship before the one [or the other of them] as far as Dan.

So he went up to the altar which he had made in Bethel on the fifteenth day of the eighth month, in the month which he had devised in his own heart [in defiance of God’s commandments]; and he held a feast for the Israelites and he went up to the altar to burn incense [in defiance of God’s law.]