Then Omri and all Israel with him went up from Gibbethon, and they besieged Tirzah.
1 Kings 16:17
Surrounding context
16:16 Now the people who were encamped heard it said, "Zimri has conspired and also has killed the king." So all Israel made Omri, the commander of the army, king over Israel that day in the camp.
16:17 Then Omri and all Israel with him went up from Gibbethon, and they besieged Tirzah.
16:18 And it happened, when Zimri saw that the city was taken, that he went into the citadel of the king's house and burned the king's house down upon himself with fire, and died,