Numbers 1:5

1:5 Now these are the names of the men who are to help you:

from Reuben, Elizur son of Shedeur;

Numbers 3:2-3

3:2 These are the names of the sons of Aaron: Nadab, the firstborn, and Abihu, Eleazar, and Ithamar. 3:3 These are the names of the sons of Aaron, the anointed priests, whom he consecrated to minister as priests.