2 Kings 11:6-8

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.

And ye shall compass the king round about, every man with his weapons in his hand: and he that cometh within the ranges, let him be slain: and be ye with the king as he goeth out and as he cometh in.