2 Kings 11:1-8

When Athaliah the mother of Ahaziah [king of Judah] saw that her son was dead, she arose and destroyed all the royal offspring. But Jehosheba, the daughter of King Joram [of Judah and half] sister of Ahaziah, took Joash the son of Ahaziah and abducted him from among the king’s sons who were to be killed, and hid him and his nurse in the bedroom. So they hid him from Athaliah, and he was not put to death. Joash was hidden with his nurse in the house (temple) of the LORD for six years, while Athaliah reigned over the land. Now in the seventh year Jehoiada [the priest, Jehosheba’s husband] sent for the captains of hundreds of the Carites and of the guard and brought them to him to the house of the LORD. Then he made a covenant with them and put them under oath in the house of the LORD, and showed them the king’s [hidden] son. He commanded them, saying, “This is the thing that you shall do: a third of you who come in [reporting for duty] on the Sabbath shall keep watch over the king’s house (a third shall also be at the [city] gate Sur, and a third at the gate behind the guards); so you shall keep watch over the palace [from three posts] for defense. Two units of you, all those who go out [off duty] on the Sabbath, shall also keep watch over the house (temple) of the LORD for [the protection of] the king. You shall surround the [young] king, each man with weapons in his hand; and whoever comes through the ranks shall be put to death. You are to be with the king when he goes out and when he comes in.”