1 Kings 16:16-25

16 And the people that were encamped heard say, Zimri hath conspired, and hath also slain the king: wherefore all Israel made Omri, the captain of the host, king over Israel that day in the camp.
17 And Omri went up from Gibbethon, and all Israel with him, and they besieged Tirzah.
18 And it came to pass, when Zimri saw that the city was taken, that he went into the palace of the king's house, and burnt the king's house over him with fire, and died,
19 For his sins which he sinned in doing evil in the sight of the LORD, in walking in the way of Jeroboam, and in his sin which he did, to make Israel to sin.
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?
21 Then were the people of Israel divided into two parts: half of the people followed Tibni the son of Ginath, to make him king; and half followed Omri.
22 But the people that followed Omri prevailed against the people that followed Tibni the son of Ginath: so Tibni died, and Omri reigned.
23 In the thirty and first year of Asa king of Judah began Omri to reign over Israel, twelve years: six years reigned he in Tirzah.
24 And he bought the hill Samaria of Shemer for two talents of silver, and built on the hill, and called the name of the city which he built, after the name of Shemer, owner of the hill, Samaria.
25 But Omri wrought evil in the eyes of the LORD, and did worse than all that were before him.