1 Kings 15:27-30

27Baasha the son of Ahijah of the house (tribe) of Issachar conspired against Nadab, and Baasha struck him down at Gibbethon, which belonged to the Philistines, while Nadab and all Israel were laying siege to Gibbethon.

28So Baasha killed Nadab in the third year of Asa king of Judah, and reigned in his place.

29As soon as he was king, Baasha struck down all the household of Jeroboam. He did not leave for Jeroboam anyone alive, but he destroyed them in accordance with the word of the Lord which He had spoken through His servant Ahijah the Shilonite—

30because of the sins committed by Jeroboam and which he made Israel commit, and because he provoked the Lord God of Israel to anger.