He bought the hill of Samaria from Shemer for two talents of silver and built a city there, calling it Samaria after the name of Shemer, who had owned the hill.
Solomon observes (Pro 28:2) that for the transgression of a land many were the princes thereof (so it was here in Israel), but by a man of understanding the state thereof shall be prolonged - so it was with Judah at the same time under Asa. When men forsake God they are out of the way of rest and establishment.
Commenting on 1 Kings 16:15-28
And Ahab the son of Omri did evil in the sight of the Lord, above all that were before him. Adding other idols to the calves, and those more abominable than they; since the other kings pretended to worship God in them, but he worshipped other gods besides him, as the following verses show.
he bought the hill Samaria of Shemer--The palace of Tirzah being in ruins, Omri, in selecting the site of his royal residence, was naturally influenced by considerations both of pleasure and advantage. In the center of a wide amphitheatre of mountains, about six miles from Shechem, rises an oblong hill with steep, yet accessible sides, and a long flat top extending east and west, and...