2 Chronicles 23:8
What Jehoiada the priest ordered is precisely what the descendants of Levi and all of Judah did. Each of them took the men who were on duty on the Sabbath as well as those who were off duty. Jehoiada the priest did not release the divisions from service,
2 Kings 11:9
So the captains of hundreds did just as Jehoiada the priest ordered. Each one of them assembled his men who were to enter on the Sabbath, along with those who were to leave on the Sabbath, and approached Jehoiada the priest.
1 Chronicles 24:1-26
With respect to the descendants of Aaron, classes of service were organized for Nadab, Abihu, Eleazar, and Ithamar, the descendants of Aaron.