Verses 7, 8. - And Bilhah Rachel's maid conceived again, and bare Jacob a second son. And Rachel said, With great wrestlings have I wrestled with my sister, literally, wrestlings of God have I wrestled with my sister, meaning, by "wrestlings of Elohim;" not great wrestlings in rivalry, with Leah (A.V. Vatablus, Ainsworth, Rosenmüller, Calvin), nor wrestlings in the cause of God, as being unwilling to leave the founding of the nation to her sister alone (Knobel), but wrestlings with God in prayer (Delitzsch, Lange, Murphy, Kalisch), wrestlings regarding Elohim and his grace (Hengstenberg, Keil), in which she at the same time contended with her sister, to whom apparently that grace had been hitherto restricted - and I have prevailed (scarcely in the sense of achieving a victory over Leah, who had already borne four sons, but in the sense of drawing the Divine favor, though only indirectly, towards herself): and she called his name Naphtali - i.e. "My Wrestling."
30:1-13 Rachel envied her sister: envy is grieving at the good of another, than which no sin is more hateful to God, or more hurtful to our neighbours and ourselves. She considered not that God made the difference, and that in other things she had the advantage. Let us carefully watch against all the risings and workings of this passion in our minds. Let not our eye be evil towards any of our fellow-servants, because our Master's is good. Jacob loved Rachel, and therefore reproved her for what she said amiss. Faithful reproofs show true affection. God may be to us instead of any creature; but it is sin and folly to place any creature in God's stead, and to place that confidence in any creature, which should be placed in God only. At the persuasion of Rachel, Jacob took Bilhah her handmaid to wife, that, according to the usage of those times, her children might be owned as her mistress's children. Had not Rachel's heart been influenced by evil passions, she would have thought her sister's children nearer to her, and more entitled to her care than Bilhah's. But children whom she had a right to rule, were more desirable to her than children she had more reason to love. As an early instance of her power over these children, she takes pleasure in giving them names that carry in them marks of rivalry with her sister. See what roots of bitterness envy and strife are, and what mischief they make among relations. At the persuasion of Leah, Jacob took Zilpah her handmaid to wife also. See the power of jealousy and rivalship, and admire the wisdom of the Divine appointment, which joins together one man and one woman only; for God hath called us to peace and purity.
and bare Jacob a second son; this was his sixth son, but the second by Bilhah.