1 Kings 16:10
“And Zimri went in and smote him, and killed him, in the twenty and seventh year of Asa king of Judah, and reigned in his stead.”
In the twenty and sixth year of Asa king of Judah began Elah the son of Baasha to reign over Israel in Tirzah, two years.
And his servant Zimri, captain of half his chariots, conspired against him, as he was in Tirzah, drinking himself drunk in the house of Arza steward of his house in Tirzah.
And Zimri went in and smote him, and killed him, in the twenty and seventh year of Asa king of Judah, and reigned in his stead.
And it came to pass, when he began to reign, as soon as he sat on his throne, that he slew all the house of Baasha: he left him not one that pisseth against a wall, neither of his kinsfolks, nor of his friends.
Thus did Zimri destroy all the house of Baasha, according to the word of the Lord, which he spake against Baasha by Jehu the prophet,
Counter-Arguments
The strongest case that this verse does not belong in this theme.

Cross-References
“And as Jehu entered in at the gate, she said, Had Zimri peace, who slew his master?”
“And it came to pass on the morrow, that he took a thick cloth, and dipped it in water, and spread it on his face, so that he died: and Hazael reigned in his stead.”
“And it was so, when they came into the midst of the city, that Ishmael the son of Nethaniah slew them, and cast them into the midst of the pit, he, and the men that were with him.”