2 Chronicles 22:11-12

Jehosheba saves Ahaziah's son, Joash

11 But Jehosheba, King Jehoram's daughter, took Ahaziah's son Joash away from the other sons that Athaliah was killing. And she hid him. She was the wife of Jehoiada the priest. She put Joash in a bedroom in the house with his nurse. She hid the child from Athaliah because she was Ahaziah's sister. So Athaliah did not kill him. 12 He stayed secretly with them in the house of God for 6 years. During that time, Athaliah ruled the country.