2 Chronicles 22:5-9

He also walked by their counsel, and went with Jehoram the son of Ahab king of Israel to wage war against Hazael king of Aram at Ramoth-gilead. But the Arameans wounded Joram.

So he returned to be healed in Jezreel of the wounds which they had inflicted on him at Ramah, when he fought against Hazael king of Aram. And Ahaziah, the son of Jehoram king of Judah, went down to see Jehoram the son of Ahab in Jezreel, because he was sick.

Now the destruction of Ahaziah was from God, in that he went to Joram. For when he arrived, he went out with Jehoram against Jehu the son of Nimshi, whom the Lord had anointed to eliminate the house of Ahab. Jehu Murders Princes of Judah

And it came about, when Jehu was executing judgment on the house of Ahab, that he found the princes of Judah and the sons of Ahaziah’s brothers attending to Ahaziah, and killed them.

He also searched for Ahaziah, and they caught him while he was hiding in Samaria; they brought him to Jehu, put him to death, and buried him. For they said, “He is the son of Jehoshaphat, who sought the Lord with all his heart.” So there was no one of the house of Ahaziah to retain the power of the kingdom.