1 Kings 16:9-12

9His servant Zimri, commander of half his chariots, conspired against Elah. Now Elah was in Tirzah, getting drunk in the house of Arza, who was in charge of the [king’s] household in Tirzah.

10Then Zimri came in and struck and killed Elah in the twenty-seventh year of Asa king of Judah, and became king in his place.

11When he became king, as soon as he sat on his throne, he killed the entire household of Baasha; he did not leave a single male [alive], either of his relatives or his friends.

12Thus Zimri destroyed the entire household of Baasha, in accordance with the word of the Lord which He spoke against Baasha through Jehu the prophet,