Ahab marries Jezebel
Ahab married Jezebel, a Phoenician princess. He also built a temple of Baal in Samaria.
Key passages
1 Ki 16:31–32

If it wasn’t enough that he went after the sins of Jeroboam the son of Nebat, he also took as wife Jezebel the daughter of Ethbaal the king of the Sidonians. He went and served Baal and bowed down to him. And he built an altar to Baal in the house of Baal which he had built in Samaria.

See also
Important Things