בראשית, פרק מ״ו, פסוק כ״ה

As the members of Jacob's family are counted, a consistent numerical pattern emerges within the family tree. The summary of Bilhah's lineage totals exactly seven individuals. The primary approach among commentators is that this specific number highlights a fixed ratio within the family structure. The descendants of the maidservant Bilhah amount to exactly half the number of descendants born to her mistress, Rachel.