'Duty' in the Bible

Now all the priests who were present had consecrated themselves regardless of their divisions. When the priests came out of the holy place,

This is what you are to do: a third of you, priests and Levites who are coming on duty on the Sabbath, are to be gatekeepers.

So the commanders of hundreds did everything Jehoiada the priest commanded. They each brought their men—those coming on duty on the Sabbath and those going off duty on the Sabbath—for Jehoiada the priest did not release the divisions.

In addition, they distributed it to males registered by genealogy three years old and above; to all who would enter the Lord’s temple for their daily duty, for their service in their responsibilities according to their divisions.