Divrey Hayamim Bais 22:9-11

Orthodox Jewish Bible

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).

¹⁰ But when Atalyah em Achazyahu saw that her son was dead, she arose and began destroying kol zera hamamlachah (all the royal seed) of the Bais Yehudah.

¹¹ But Yehoshavat Bat HaMelech, took Yoash ben Achazyahu, and stole him away from among the Bnei HaMelech that were being murdered, and put him and his nurse in a cheder hamittot (bedroom). So Yehoshavat Bat HaMelech Yehoram, the isha of Yehoyada HaKohen, (for she was the achot of Achazyahu), hid him from Atalyah, so that she slaughtered him not.