Pilatus skrev:
Inga judar togs till Egypten som fångar. Inga judar före lagen. I 2 Mos 1 står det om Israels söner som kom till Egypten tillsammans med Jakob, var och en med sin familj.
This reading of Genesis 29-30, which suggests that J added five sons to Jacob’s brood, offers a particularly good example of how the Supplementary Hypothesis can simplify an otherwise confusing and disjointed set of narratives, It provides a clear-cut division of texts, each with its own agenda. When the scribes of the Northern Kingdom escaped the destruction wrought by the Assyrians, they found a welcome home in the southern Kingdom of Judah, but the stories and texts that they brought with them had to be adapted for their new Judean audience. This is where J makes his contribution[15]
Rachel, who was the mother of Joseph and therefore the matriarch of the Northern Kingdom, could no longer be allowed to win the procreative contest against her sister Leah, who was viewed by the Judeans as their matriarch. Thus, J has Leah gives birth to four more children, bringing her total up to seven (Reuben, Simeon, Levi, Judah, Issachar, Zebulun, Dinah) in seven years, straining credulity and genre, and turning a narrative of a procreative contest into something halfway between a list and a story. Leah not only overtakes Rachel, but single-handedly gives birth to the total number of children posited by the earlier E document. Her handmaiden, Zilpah, is also just as fecund as Rachel’s handmaiden, Bilhah, and thus Rachel has no advantage in this quarter either.
This is how J arrives at twelve sons from E’s original seven—the number twelve is perhaps incidental, but perhaps not, since it is a typological figure that appears throughout the Bible in various contexts.[16] Most importantly, J has Leah give birth to Judah, the father of the central tribe of the Southern Kingdom. In the subsequent Joseph cycle, the Judean authors will place Judah at the forefront of the narrative, and he will vie with Joseph for the position as Jacob’s most important son.
http://thetorah.com/how-the-israelite-f ... -of-jacob/