Midrasch zu Bereschit 36:15

(Gen. 37:1-2:) NOW JACOB DWELT < IN THE LAND >…. THESE ARE THE GENERATIONS OF JACOB: JOSEPH. What is written on the matter above (in Gen. 36:15)? THESE ARE THE LORDS OF THE CHILDREN OF ESAU. When Jacob saw them, he became alarmed and said: Who can stand against these?⁸Gen. R. 84:5; Tanh., Gen. 9:1. To what is the matter comparable? To a goldsmith who would sit and ply his trade. His apprentice raised his eyes and saw a lot of camels who were loaded with straw. He began to say: Who can stand against these? His master said to him: If a spark went out of this furnace, it would burn all of them. So in the case of our father Jacob, when he saw all of Esau's lords, he began to be afraid and said: Who can stand against these? The Holy One said to him: Look at what is written below (in Gen. 37:2): THESE ARE THE GENERATIONS OF JACOB: JOSEPH. By your life, someone shall spring from Joseph, < a person > who shall burn all of them, as stated (in Obad. 18): THE HOUSE OF JACOB SHALL BE A FIRE, AND THE HOUSE OF JOSEPH A FLAME, AND THE HOUSE OF ESAU SHALL BE STRAW; < THEY SHALL BURN IT >…. R.Hanina said: It is written (in Is. 47:14): SEE, THEY HAVE BECOME LIKE STRAW; FIRE CONSUMES THEM. It is therefore written (in Gen. 37:2): THESE ARE THE GENERATIONS OF JACOB: JOSEPH.