And it came to pass, when she was in hard labor, that the midwife said unto her, Fear not; thou shalt have this son also.

Wesley's Notes

35:17 Rachel had said when she bore Joseph, God shall give me another son, which now the midwife remembers, and tells her, her words were made good. Yet this did not avail; unless God command away fear, no one else can. We are apt in extreme perils to comfort ourselves and our friends with the hopes of a temporal deliverance, in which we may be disappointed; we had better ground our comforts on that which cannot fail us, the hope of eternal life. Rachel had passionately said, Give me children, or else I die; and now she had children (for this was her second) she died.

Matthew Henry's Concise Commentary

35:16-20 Rachel had passionately said, Give me children, or else I die; and now that she had children, she died! The death of the body is but the departure of the soul to the world of spirits. When shall we learn that it is God alone who really knows what is best for his people, and that in all worldly affairs the safest path for the Christian is to say from the heart, It is the Lord, let him do what seemeth him good. Here alone is our safety and our comfort, to know no will but his. Her dying lips called her newborn son Ben-oni, the son of my sorrow; and many a son proves to be the heaviness of her that bare him. Children are enough the sorrow of their mothers; they should, therefore, when they grow up, study to be their joy, and so, if possible, to make them some amends. But Jacob, because he would not renew the sorrowful remembrance of the mother's death every time he called his son, changed his name to Benjamin, the son of my right hand: that is, very dear to me; the support of my age, like the staff in my right hand.