NET
5 He ordered them, “This is what you must do. One third of the unit that is on duty during the Sabbath will guard the royal palace.
Darby
5 And he commanded them saying, This is the thing which ye shall do: a third part of you, that come in on the sabbath, shall be keepers of the watch of the king's house;
KJV
5 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;