2 Chronicles 22:10-12

When Ahaziah’s mother, Athaliah, saw that her son was dead, she killed all the royal family in Judah. But Jehosheba, King Jehoram’s daughter, took Joash, Ahaziah’s son. She stole him from among the other sons of the king who were going to be murdered and put him and his nurse in a bedroom. So Jehosheba, who was King Jehoram’s daughter and Ahaziah’s sister and the wife of Jehoiada the priest, hid Joash so Athaliah could not kill him. He hid with them in the Temple of God for six years. During that time Athaliah ruled the land.