Parashat Vayeshev.

And Jacob abode. After it (Scripture) has described to you the settlements of Esau and his descendants in a brief manner, since they were not distinguished and important enough that it should be related in detail how they settled down and that there should be given an account of their wars and how they drove out the Horites (see Deuteronomy 2:12), it explains clearly and at length the settlements made by Jacob and his descendants and all the events which brought these about, because these are regarded by the Omnipresent as of sufficient importance to speak of them at length. Thus, too, you will find that in the case of the ten generations from Adam to Noah it states “So-and-so begat so-and-so”, but when it reaches Noah it deals with him at length. Similarly, of the ten generations from Noah to Abraham it gives but a brief account, but when it comes to Abraham it speaks of him more fully. It may be compared to the case of a jewel that falls into the sand: a man searches in the sand, sifts it in a sieve until he finds the jewel. When he has found it he throws away the pebbles and keeps the jewel (Midrash Tanchuma, Vayeshev 1). Another explanation of וישב יעקב AND JACOB ABODE: The camels of a flax dealer once came into a city laden with flax. A blacksmith asked in wonder where all that flax could be stored, and a clever fellow answered him, “A single spark caused by your bellows can burn up all of it.” “So, too, when Jacob saw (heard of) all these chiefs whose names are written above he said wonderingly, “Who can conquer all these?” What is written after the names of these chieftains?, and in this may be found the reply to Jacob’s question: These are the generations of Jacob, Joseph. For it is written (Obadiah 1:18) “And the house of Jacob shall be a fire and the house of Joseph a flame, and the house of Esau, for stubble: one spark issuing from Joseph will burn up all of these (descendants of Esau) (Genesis Rabbah 84:5). The passage beginning “Another explanation” is found in an old Rashi text.

Zion Torah's English rendering of Rashi's commentary, CC BY-SA 4.0.