2 Chronicles 22:4-9

4And he did evil in the sight of the LORD, as the house of Ahab had done, for to his destruction they were his counselors after the death of his father.

5Ahaziah also followed their counsel and went with Joram son of Ahab king of Israel to fight against Hazael king of Aram at Ramoth-gilead. But the Arameans1 wounded Joram.2 6So he returned to Jezreel to recover from the wounds they had inflicted on him at Ramah3 when he fought against Hazael king of Aram. Then Ahaziah4 son of Jehoram king of Judah went down to Jezreel to visit Joram son of Ahab, because Joram had been wounded.

7Ahaziah’s downfall came from God when he went to visit Joram. When Ahaziah arrived, he went out with Joram to meet Jehu son5 of Nimshi, whom the LORD had anointed to destroy the house of Ahab.

8So while Jehu was executing judgment on the house of Ahab, he found the rulers of Judah and the sons of Ahaziah’s brothers who were serving Ahaziah, and he killed them.

9Then Jehu looked for Ahaziah, and Jehu’s soldiers captured him while he was hiding in Samaria. So Ahaziah was brought to Jehu and put to death. They buried him, for they said, “He is the grandson of Jehoshaphat, who sought the LORD with all his heart.”

So no one was left from the house of Ahaziah with the strength to rule the kingdom.