1 Kings 16:23-24

23In the thirty-first year of King Asa of Judah, Omri began to reign over Israel, and reigned 12 years, six years in Tirzah.

24Then he bought the hill of Samaria from Shemer for two talents of silver, and built a city on the hill. He named the city that he built Samaria, based on the name Shemer, the owner of the hill.