2 Kings 11:1-3

When Athaliah the mother of Ahaziah saw that her son was dead, she arose and destroyed all the royal heirs. [2] But Jehosheba, the daughter of King Joram, sister of Ahaziah, took Joash the son of Ahaziah, and stole him away from among the king's sons who were being murdered; and they hid him and his nurse in the bedroom, from Athaliah, so that he was not killed. [3] So Joash was hidden with her in the house of the LORD for six years, while Athaliah reigned over the land.