1 Kings 16:23 in the King James Version
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.
Context
22 But the people who followed Omri prevailed against the people who followed Tibni the son of Ginath; so Tibni died, and Omri reigned.
23 In the thirty-first year of Asa king of Judah, Omri began to reign over Israel for twelve years. He reigned six years in Tirzah.
24 He bought the hill Samaria of Shemer for two talents of silver; and he built on the hill, and called the name of the city which he built, Samaria, after the name of Shemer, the owner of the hill.