2 Chronicles 22:10 - 22:12
10 Now Athaliah the mother of Ahaziah saw that her son had died. So she rose and destroyed all the royal seed of the house of Judah. 11 But Jehoshabeath the king’s daughter took Joash the son of Ahaziah, and stole him from among the king’s sons who were being put to death, and put him and his nurse in the bedroom. 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 she did not put him to death. 12 So he was hidden with them in the house of God six years while Athaliah was reigning over the land.