2 Kings 11:3

Now when Athaliah the mother of Ahaziah saw that her son was dead, she arose and destroyed all the seed royal.

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 slain, even him and his nurse, [and put them] in the bedroom; and they hid him from Athaliah, so that he was not slain;

In the seventh year Jehoiada sent and fetched the captains over hundreds of the Carites and of the guard, and brought them to him into the house of Yahweh; and he made a covenant with them, and took an oath of them in the house of Yahweh, and showed them the king's son.

He commanded them, saying, "This is the thing that you shall do: a third part of you, who come in on the Sabbath, shall be keepers of the watch of the king's house;