1 Chronicles 24:31

31 They cast lots, just as their relatives, the sons of Aaron, had done. They did it in front of King David, Zadok and Ahimelech. They did it in front of the family leaders of the priests. They also did it in front of the family leaders of the Levites. The families of the oldest brother were treated in the same way as the families of the youngest.

1 Chronicles 24:31 Meaning and Commentary

1 Chronicles 24:31

These likewise cast lots over against their brethren, the
sons of Aaron
These, being divided into twenty four classes also, cast lots, which class should answer to, attend upon, and serve the first course of the priests, and which the second, and so on. And this they did in the same solemn and public manner as the priests had done:

in the presence of David the king, and Zadok, and Ahimelech, and the
chief of the fathers of the priests and Levites;
as in ( 1 Chronicles 24:6 )

even the principal fathers over against their younger brethren;
the sense is, either that the one stood over against the other, to be distributed by lot, the one as well as the other; or they were chosen by lot, let it fall as it would, without any regard to age or dignity, to the seniority or largeness of houses and families; but as they were chosen, be they younger or elder, richer or poorer, their families more or less numerous and ancient, so they took their places.

1 Chronicles 24:31 In-Context

29 From Kish came Jerahmeel. Jerahmeel was the son of Kish.

30 The sons of Mushi were Mahli, Eder and Jerimoth. Those were the Levites, family by family.

31 They cast lots, just as their relatives, the sons of Aaron, had done. They did it in front of King David, Zadok and Ahimelech. They did it in front of the family leaders of the priests. They also did it in front of the family leaders of the Levites. The families of the oldest brother were treated in the same way as the families of the youngest.