25 Nadab son of Jeroboam became king over Israel in the second year of Asa's rule in Judah. He was king of Israel two years. 26 He was openly evil before God - he followed in the footsteps of his father who both sinned and made Israel sin. 27 Baasha son of Ahijah of the tribe of Issachar ganged up on him and attacked him at the Philistine town of Gibbethon while Nadab and the Israelites were doing battle there. 28 Baasha killed Nadab in the third year of Asa king of Judah and became Israel's next king.
Matthew Henry's Commentary on 1 Kings 15:25-28
Commentary on 1 Kings 15:25-34
(Read 1 Kings 15:25-34)
During the single reign of Asa in Judah, the government of Israel was in six or seven different hands. Observe the ruin of the family of Jeroboam; no word of God shall fall to the ground. Divine threatenings are not designed merely to terrify. Ungodly men execute the just judgments of God upon each other. But in the midst of dreadful sins and this apparent confusion, the Lord carries on his own plan: when it is fully completed, the glorious justice, wisdom, truth, and mercy therein displayed, shall be admired and adored through all the ages of eternity.