1 Kings 16:23-24

In the thirty-first year of Asa king of Judah, Omri became king over Israel and reigned twelve years; he reigned six years at Tirzah. He bought the hill Samaria from Shemer for two talents of silver; and he built on the hill, and named the city which he built Samaria, after the name of Shemer, the owner of the hill.