Kitto's Popular Cyclopedia of Biblial Literature
Om´ri (God-taught), sixth king of Israel, who began to reign in B.C. 929, and reigned twelve years. He was raised to the throne by the army, while it was engaged in the siege of Gibbethon, a Levitical city in Dan, of which the Philistines had gained possession, when the news came to the camp of the death of Elah, and the usurpation of Zimri. On this, the army proclaimed their general, Omri, king of Israel. He then lost not a moment, but leaving Gibbethon in the power of the infidels, went and besieged his competitor in Tirzah. But he was no sooner delivered of this rival [ZIMRI], than another appeared in the person of Tibni, whom a part of the people had raised to the throne, probably from unwillingness to submit to military dictation. This occasioned a civil war, which lasted six years, and left Omri undisputed master of the throne, B.C. 925. His reign lasted six years more, and its chief event was the foundation of Samaria, which thenceforth became the capital city of the kingdom of Israel () [SAMARIA].
Kitto, John, ed. Entry for 'Omri'. "Kitto's Popular Cyclopedia of Biblial Literature". https://www.studylight.org/encyclopedias/eng/kbe/o/omri.html.