2 Chronicles 22:3-4, 10-12

He also walked in the ways of the house of Ahab; for his mother was his counsellor to do wickedly. And he did that which was evil in the sight of Jehovah, as did the house of Ahab; for they were his counsellors after the death of his father, to his destruction.

Now when Athaliah the mother of Ahaziah saw that her son was dead, she arose and destroyed all the seed royal of the house of Judah. But Jehoshabeath, the daughter of the king, took Joash the son of Ahaziah, and stole him away from among the king’s sons that were slain, and put him and his nurse in the bedchamber. So Jehoshabeath, the daughter of king Jehoram, the wife of Jehoiada the priest (for she was the sister of Ahaziah), hid him from Athaliah, so that she slew him not. And he was with them hid in the house of God six years: and Athaliah reigned over the land.