1 Kings 16:20
Now the rest of the acts of Zimri, and his treason that he wrought, are they not written in the book of the chronicles of the kings of Israel? Now the rest of the acts of Zimri, and his treason that he wrought, are they not written in the book of the chronicles of the kings of Israel?
The verse closes the account of Zimri and sends the reader to the book of the chronicles of the kings of Israel for the rest of his acts and his treason.
Zimri was a captain who seized the throne of Israel by murdering King Elah and then killed the remaining members of Baasha's house to eliminate rivals.
His reign lasted only seven days and ended when the army declared Omri king and marched on the capital; seeing what that meant, Zimri burned the palace over himself and perished, thus slain when Omri, captain of Israel's host, rose against him.
He stands in the succession of the kings of Israel after the divided kingdom was formed, with ten tribes in Israel and two and a half tribes in Judah, after Nadab, Baasha, and Elah and before Omri and the wicked Ahab, contemporary with Abijah and Asa in Judah.
His brief violent end continues the steady decline from Jeroboam, who made Israel to sin, through Nadab, Baasha, and Elah, and falls inside the history of the two separate kingdoms covering about eighty years from the revolt of the ten tribes to the death of Jehoshaphat, including the one long good reign of Asa of Judah that spanned all these wicked reigns of Israel.
Omri succeeded him and became the strongest influence among the Ten Tribes, and after a brief opposition that was soon crushed he left Shechem as the royal seat, bought the hill of Samaria from Shemer for two talents of silver, and built the city of Samaria there for the royal capital of Israel; he reigned wickedly for twelve years while the city grew in grandeur and beauty, and he fathered the wicked Ahab.
The verse belongs to the account of Israel's apostasy under her kings, by which the nation forsook the worship of the living God for idols and turned from the God-given plan of worship that pointed to Christ and revealed the way of salvation from sin and all that was pure and true and uplifting, to the impure, untrue, and degrading worship of Baal and Ashtoreth, the worship of the creature instead of the Creator, until Baal worship had corrupted nearly the whole nation in transgression of God's commandments.
That apostasy comes to a climax in the sixteenth chapter when Ahab the son of Omri ascends the throne and does more to provoke the Lord God of Israel to anger than all the kings before him, taking to wife Jezebel the daughter of Ethbaal king of the Zidonians and serving and worshiping Baal, building a temple to Baal with four hundred and fifty priests in attendance and making a grove in honor of Ashtoreth where four hundred priests ministered at Jezebel's expense, followed by persecution of those true to God until only seven thousand in all Israel had not worshiped Baal.
This idolatrous setting under Ahab and Jezebel is the context for what follows the verse, the reign of Ahab and the work of the prophet Elijah, who fearlessly denounced the nation's sin and called Israel back to worshiping Jehovah and obeying his law.