2 Chronicles 22:3-4, 10-12

Ahaziah followed the ways of Ahab’s family, because his mother encouraged him to do wrong. Ahaziah did what the LORD said was wrong, as Ahab’s family had done. They gave advice to Ahaziah after his father died, and their bad advice led to his death.

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.