1 Kings 12:32
“And Jeroboam ordained a feast in the eighth month, on the fifteenth day of the month, like unto the feast that is in Judah, and he offered upon the altar. So did he in Beth–el, sacrificing unto the calves that he had made: and he placed in Beth–el the priests of the high places which he had made.”
And this thing became a sin: for the people went to worship before the one, even unto Dan.
And he made an house of high places, and made priests of the lowest of the people, which were not of the sons of Levi.
And Jeroboam ordained a feast in the eighth month, on the fifteenth day of the month, like unto the feast that is in Judah, and he offered upon the altar. So did he in Beth–el, sacrificing unto the calves that he had made: and he placed in Beth–el the priests of the high places which he had made.
So he offered upon the altar which he had made in Beth–el the fifteenth day of the eighth month, even in the month which he had devised of his own heart; and ordained a feast unto the children of Israel: and he offered upon the altar, and burnt incense.
Counter-Arguments
The strongest case that this verse does not belong in this theme.

Cross-References
“And, behold, there came a man of God out of Judah by the word of the Lord unto Beth–el: and Jeroboam stood by the altar to burn incense.”
“And when Aaron saw it, he built an altar before it; and Aaron made proclamation, and said, To morrow is a feast to the Lord.”
“And king Solomon, and all the congregation of Israel, that were assembled unto him, were with him before the ark, sacrificing sheep and oxen, that could not be told nor numbered for multitude.”
“Then Amaziah the priest of Beth–el sent to Jeroboam king of Israel, saying, Amos hath conspired against thee in the midst of the house of Israel: the land is not able to bear all his words.”
“And the Lord spake unto Moses, saying,”