NET
23 In the thirty-first year of Asa’s reign over Judah, Omri became king over Israel. He ruled for twelve years, six of them in Tirzah.
Darby
23 In the thirty-first year of Asa king of Judah, Omri began to reign over Israel, twelve years; he reigned six years in Tirzah.
KJV
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.