2 Chronicles 22:10-12

When Ahaziah’s mother Athaliah saw that her son was dead, she took over. She began by massacring the entire royal family. Jehosheba, daughter of King Jehoram, took Ahaziah’s son Joash, and kidnapped him from among the king’s sons slated for slaughter. She hid him and his nurse in a private room away from Athaliah. So Jehosheba, daughter of King Jehoram and Ahaziah’s sister—she was also the wife of Jehoiada the priest—saved Joash from the murderous Queen Athaliah. He was there with her, hidden away for six years in The Temple of God. Athaliah, oblivious to his existence, ruled the country.