2CH 22:9

9 And he searched for Achazyahu, and they captured him while he was hiding in Shomron [(Samaria)], and brought him to Yehu; and when they had slain him, they buried him. Because, they said, he is a ben Yehoshaphat, who sought Hashem with all his levav. So the Bais Achazyahu had no koach to retain the mamlachah [(kingdom)].