Numbers 1:2

Take ye, Moses and his assistants, the sum of all the congregation of the children of Israel after their families, the large divisions of the tribes known by the name of some prominent leader, Exodus 6:14, by the house of their fathers, which was a subdivision of the former, with the number of their names, numbered and recorded individually, every male by their polls, for these only were entered into the lists, Exodus 30:14;