1 Kings 15:27-29

27Then Baasa son of Ahijah of the house of Issachar conspired against him, and Baasa struck him down at Gibbethon, which belonged to the Philistines, while Nadab and all Israel were besieging Gibbethon.

28So Baasa slew him, in the third year of King Asa of Judah, and became king in his place.

29As soon as he became king, he struck down all the household of Jeroboam. He did not spare Jeroboam anything with breath until he had destroyed him, just as was the word of Adonai that He spoke by the hand of His servant Ahijah the Shilonite,