Essay zu Bereschit 30:31

The narrative now demonstrates (1) how Yaakov prospers in exile, increasing both in wealth and in progeny, and thus (2) how God fulfills his promise to the Patriarchs to “make them many.” Characteristically for the Bible, this takes place as a result of human emotions: the jealousy of two sisters who are married to the same man. The emotions, interestingly, are portrayed largely through the names given to Yaakov’s sons. In the end Lea seems to be the victor, at least in the terms of a culture that prizes the production of male children; she becomes the mother of fully half of the sons of Israel (Redak).