1 Kings 16:5
Now the rest of the acts of Baasha, and what he did, and his might, are they not written in the book of the chronicles of the kings of Israel? Now the rest of the acts of Baasha, and what he did, and his might, are they not written in the book of the chronicles of the kings of Israel?
The verse belongs to the history of the kings of Israel and Judah after the division of the kingdom, covering the period from the revolt of the ten tribes to the death of Jehoshaphat. It stands in the account of the divided kingdom and its succession of rulers, placing Baasha as a king of Israel after the division in the line of Nadab, Baasha, Elah, Zimri, Omri, and the wicked Ahab. In that succession Baasha reigned twenty-four years, his son Elah followed him, and the house of Baasha came to an end with Elah. The rest of his acts, what he did, and his might are preserved in the book of the chronicles of the kings of Israel.
The passage in 1 Kings 16:1-7 shows Jehu prophesying against Baasha, as prophets delivered the Lord's messages to the kings in Israel. The chapters to which the verse belongs describe the apostasy of Israel, in which the nation was led by her kings to forsake the worship of the living God and turn to the worship of idols. That turning was away from the God-given plan of worship which pointed to Christ and revealed the way of salvation from sin, forsaking all that was pure and true and uplifting for the worship of Baal and Ashtoreth, that which was impure, untrue, and degrading, the worship of the creature instead of the Creator.
That apostasy comes to a climax with Ahab the son of Omri ascending the throne and provoking God more than all before him through heathen marriage and open Baal worship. He ruled a nation corrupted by Baal worship and disobedience to God's commandments, and this provides the setting for Elijah's ministry. In that great apostasy in Israel during the days of Elijah, God had a faithful remnant who responded to the call of His prophet.