2 Kings 11:5-7

5And he commanded them, saying, “This is the thing that you shall do: 1a third of you, who come in on the Sabbath and keep watch over the king’s house

6(a third also shall be at the gate Sur, and a third at the gate behind the 2guards), 3shall keep watch over the house 4for defense.

7And two parts of you, all who go out on the Sabbath, shall also keep watch over the house of the Lord for the king.