Read 2 Kings 11:5 Using Other Translations
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 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
Jehoiada told them, “This is what you must do. A third of you who are on duty on the Sabbath are to guard the royal palace itself.