2 Kings 11:5-8

5And he commanded them, "This is the thing that you shall do: one third of you, those who come off duty on the Sabbath and guard the king's house

6(another third being at the gate Sur and a third at the gate behind the guards) shall guard the palace.

7And the two divisions of you, which come on duty in force on the Sabbath and guard the house of the Lord on behalf of the king,

8shall surround the king, each with his weapons in his hand. And whoever approaches the ranks is to be put to death. Be with the king when he goes out and when he comes in."