1 Kings 22:41
“And Jehoshaphat the son of Asa began to reign over Judah in the fourth year of Ahab king of Israel.”
Now the rest of the acts of Ahab, and all that he did, and the ivory house which he made, and all the cities that he built, are they not written in the book of the chronicles of the kings of Israel?
So Ahab slept with his fathers; and Ahaziah his son reigned in his stead.
And Jehoshaphat the son of Asa began to reign over Judah in the fourth year of Ahab king of Israel.
Jehoshaphat was thirty and five years old when he began to reign; and he reigned twenty and five years in Jerusalem. And his mother’s name was Azubah the daughter of Shilhi.
And he walked in all the ways of Asa his father; he turned not aside from it, doing that which was right in the eyes of the Lord: nevertheless the high places were not taken away; for the people offered and burnt incense yet in the high places.
Counter-Arguments
The strongest case that this verse does not belong in this theme.

Related Verses
“Ahaziah the son of Ahab began to reign over Israel in Samaria the seventeenth year of Jehoshaphat king of Judah, and reigned two years over Israel.”
“And it came to pass in the third year, that Jehoshaphat the king of Judah came down to the king of Israel.”
“Jehoshaphat was thirty and five years old when he began to reign; and he reigned twenty and five years in Jerusalem. And his mother’s name was Azubah the daughter of Shilhi.”
“And Jehoshaphat made peace with the king of Israel.”
“And in the fifth year of Joram the son of Ahab king of Israel, Jehoshaphat being then king of Judah, Jehoram the son of Jehoshaphat king of Judah began to reign.”