1 Kings 16:22-26

But the people who followed Omri prevailed over the people who followed Tibni the son of Ginath. And Tibni died and Omri became king.

In the thirty-first year of Asa king of Judah, Omri became king over Israel and reigned for twelve years; he reigned for six years at Tirzah.

And he purchased 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.

Now Omri did evil in the sight of the Lord, and acted more wickedly than all who were before him.

For he walked entirely in the way of Jeroboam the son of Nebat and in his sins into which he misled Israel, provoking the Lord God of Israel to anger with their idols.