2 Kings 11:7 (KJV)

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.

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.

And the captains over the hundreds did according to all things that Jehoiada the priest commanded: and they took every man his men that were to come in on the sabbath, with them that should go out on the sabbath, and came to Jehoiada the priest.