1 Chronicles 24:31

24:31 Just like their relatives, the descendants of Aaron, they also cast lots before King David, Zadok, Ahimelech, the leaders of families, the priests, and the Levites. The families of the oldest son cast lots along with the those of the youngest.

1 Chronicles 25:8

25:8 They cast lots to determine their responsibilities – oldest as well as youngest, teacher as well as student.