15 But Leah said to her, Is it a small thing that you have taken my husband from me? and now would you take my son's love-fruits? Then Rachel said, You may have him tonight in exchange for your son's love-fruits. 16 In the evening, when Jacob came in from the field, Leah went out to him and said, Tonight you are to come to me, for I have given my son's love-fruits as a price for you. And he went in to her that night.
Matthew Henry's Commentary on Genesis 30:15-16
Commentary on Genesis 30:14-24
(Read Genesis 30:14-24)
The desire, good in itself, but often too great and irregular, of being the mother of the promised Seed, with the honour of having many children, and the reproach of being barren, were causes of this unbecoming contest between the sisters. The truth appears to be, that they were influenced by the promises of God to Abraham; whose posterity were promised the richest blessings, and from whom the Messiah was to descend.