1 Kings 16:31-32

31And it came to pass, as though it had been a trivial thing for him to walk in the sins of Jeroboam the son of Nebat, that he took as wife Jezebel the daughter of Ethbaal, king of the Sidonians; and he went and served Baal and worshiped him.

32Then he set up an altar for Baal in the temple of Baal, which he had built in Samaria.