דברי הימים א, פרק כ״ד, פסוק א׳

Organizing the sacred duties required a highly structured system for the priests. The primary approach among commentators is that the narrative now transitions to introduce how these priests were arranged into specific working shifts. It sets the stage by identifying the sons of Aaron and explaining the way they were separated into different groups to carry out their daily service.

To provide a clear and accurate picture of this system, the historical record returns to the very beginning of Aaron's well-known family line. By tracing the family tree from its roots, it systematically counts the descendants and maps out the exact arrangement of their working divisions.