1 Kings 16:20

16 and the people in the camp heard that Zimri had not only conspired but had also struck down the king. So there in the camp that very day, all Israel proclaimed Omri, the commander of the army, king over Israel.

17 Then Omri and all the Israelites marched up from Gibbethon and besieged Tirzah.

18 When Zimri saw that the city was captured, he entered the citadel of the royal palace and burned it down upon himself. So he died

19 because of the sins he had committed, doing evil in the sight of the LORD and following the example of Jeroboam and the sin he had committed and had caused Israel to commit.

20 As for the rest of the acts of Zimri and the treason he committed, are they not written in the Book of the Chronicles of the Kings of Israel?

21 At that time the people of Israel were divided: Half of the people supported Tibni son of Ginath as king, and half supported Omri.

22 But the followers of Omri proved stronger than those of Tibni son of Ginath. So Tibni died and Omri became king.

23 In the thirty-first year of Asa’s reign over Judah, Omri became king of Israel, and he reigned twelve years, six of them in Tirzah.

24 He bought the hill of Samaria from Shemer for two talents of silver and built a city there, calling it Samaria after the name of Shemer, who had owned the hill.

Read all of 1 Kings 16