2 Chronicles 22:7-9

7But the downfall of Ahaziah was ordained by God, in that he went to Joram (Jehoram). For when he arrived there he went out [as an ally] with Jehoram against Jehu the son of Nimshi, whom the Lord had anointed to destroy the house of Ahab.

8It came about that when Jehu was executing judgment on the house of Ahab, he found the leaders of Judah and the sons of Ahaziah’s [murdered] brothers ministering to Ahaziah, and he killed them.

9Jehu also searched for Ahaziah, who was hiding in Samaria; he was captured, brought to Jehu, and put to death. They buried him, for they said, “After all, he is the grandson of Jehoshaphat, who sought the Lord with all his heart.” So the house of Ahaziah had no one left to retain the power to rule over the kingdom.