1 Kings 15:9
“And in the twentieth year of Jeroboam king of Israel reigned Asa over Judah.”
Now the rest of the acts of Abijam, and all that he did, are they not written in the book of the chronicles of the kings of Judah? And there was war between Abijam and Jeroboam.
And Abijam slept with his fathers; and they buried him in the city of David: and Asa his son reigned in his stead.
And in the twentieth year of Jeroboam king of Israel reigned Asa over Judah.
And forty and one years reigned he in Jerusalem. And his mother’s name was Maachah, the daughter of Abishalom.
And Asa did that which was right in the eyes of the Lord, as did David his father.
Counter-Arguments
The strongest case that this verse does not belong in this theme.

Related Verses
“And Nadab the son of Jeroboam began to reign over Israel in the second year of Asa king of Judah, and reigned over Israel two years.”
“In the twenty and seventh year of Jeroboam king of Israel began Azariah son of Amaziah king of Judah to reign.”
“In the third year of Asa king of Judah began Baasha the son of Ahijah to reign over all Israel in Tirzah, twenty and four years.”
“And in the thirty and eighth year of Asa king of Judah began Ahab the son of Omri to reign over Israel: and Ahab the son of Omri reigned over Israel in Samaria twenty and two years.”
“Now in the eighteenth year of king Jeroboam the son of Nebat reigned Abijam over Judah.”