1 Kings 16:20
16:20 The rest of the events of Zimri’s reign, including the details of his revolt, are recorded in the scroll called the Annals of the Kings of Israel.
1 Kings 16:16
16:16 While deployed there, the army received this report:
“Zimri has conspired against the king and assassinated him.”
So all Israel made Omri, the commander of the army, king over Israel that very day in the camp.