2 Kings 11:3-7

And he was with her hid in the house of the LORD six years. And Athaliah did reign over the land.

And the seventh year Jehoiada sent and fetched the rulers over hundreds, with the captains and the guard, and brought them to him into the house of the LORD, and made a covenant with them, and took an oath of them in the house of the LORD, and shewed them the king’s son.

And he commanded them, saying, This is the thing that ye shall do; A third part of you that enter in on the sabbath shall even be keepers of the watch of the king’s house;

And a third part shall be at the gate of Sur; and a third part at the gate behind the guard: so shall ye keep the watch of the house, that it be not broken down.

And two parts of all you that go forth on the sabbath, even they shall keep the watch of the house of the LORD about the king.