This verse provides insight into the family structure of Jacob, one of the patriarchs of Israel. Bilhah was Rachel's maidservant, and Rachel, who initially struggled with infertility, gave Bilhah to Jacob as a wife to bear children on her behalf. This practice was culturally accepted in ancient times and was a way to ensure the continuation of a family line. Dan and Naphtali, the sons of Bilhah, became two of the twelve tribes of Israel, each playing a significant role in the history and development of the nation of Israel.
The mention of Bilhah's sons in this genealogy underscores the theme of God's providence and faithfulness. Despite human struggles and societal norms, God's promises to Abraham, Isaac, and Jacob were fulfilled through their descendants. This passage also reflects the intricate and sometimes challenging family relationships that are part of the biblical narrative, reminding us of the diverse ways God works through human history to accomplish divine purposes.