1 Kings 16:23-24

23In the thirty-first year of Asa king of Judah, Omri began to reign over Israel, and he reigned for twelve years; six years he reigned in Tirzah.

24He bought the hill of Samaria from Shemer for two talents of silver, and he fortified the hill and called the name of the city that he built Samaria, after the name of Shemer, the owner of the hill.