2 Chronicles 22:9-11

Amplified Bible

⁹ Jehu 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.

¹⁰ Now when Athaliah the mother of Ahaziah saw that her son was dead, she rose and destroyed all the royal family of the house of Judah. ¹¹ But Jehoshabeath, the king’s daughter, took Joash the [infant] son of Ahaziah and stole him away from among the king’s sons who were being put to death, and she placed him and his nurse in the bedroom. So Jehoshabeath, the daughter of King Jehoram [of Judah] and wife of Jehoiada the priest, hid Joash from [his grandmother] Athaliah so that she did not murder him (for Jehoshabeath was the sister of Ahaziah).