1 Kings 15:26-28

Amplified Bible

²⁶ He did evil in the sight of the Lord and walked in the way of his father [Jeroboam] and in his sin [of idolatry], with which he made Israel sin. ²⁷ Baasha 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.

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