Isaac replies: “Look, I have made him your lord, I have given him all his kinsmen as servants, and I have given him grain and wine to sustain him.” (Gen 27:37)
So Jacob has something to eat and drink. Then he goes in search of a wife. On his way he makes this proclamation…
Jacob took this vow: “If God will be with me and will guard me on this road that I am traveling, giving me bread to eat and clothes to wear, so that I return to my father’s house in peace, then Adonai will be my God;… (Gen 28:20)
So Jacob had provisions before, and now he doesn’t? He had grain (for making bread) and now he’s asking God for bread? What happened to the things Isaac gave him?
The Book of Jasher (The Upright Book) sheds light on this.
First, There is controversy over whether the Book of Jasher is truly scriptural but it is mentioned in the bible twice:
“Is not this written in the Book of Jasher?” (Joshua 10:13)
“Behold it is written in the Book of Jasher.” (2 Sam 1:18)
And Josephus, (a Jewish Roman historian), comments that the Book of Jasher is, “one of the books laid up in the Temple.”
That is, the temple in the first century. So there’s no reason to think that it is not scriptural.
The Book of Jasher recounts what happened in between Jacob leaving with provisions to find a wife, and being without provisions before he finds his wife…
Jasher 29:30 And Isaac finished commanding Jacob and blessing him, and he gave him many gifts, together with silver and gold, and he sent him away; and Jacob hearkened to his father and mother; he kissed them and arose and went to Padan-Aram; and Jacob was seventy-seven years old when he went out from the land of Kanaan from B’ersheva.
31 And when Jacob went away to go to Charan Esau called unto his son Elifaz, and secretly spoke unto him, saying, Now hasten, take your sword in your hand and pursue Jacob and pass before him in the road, and lurk for him, and slay him with your sword in one of the mountains, and take all belonging to him and come back.
32 And Elifaz the son of Esau was an active man and expert with the bow as his father had taught him, and he was a a noted hunter in the field and a valiant man.
33 And Elifax did as his father had commanded him, and Elifax was at that time thirteen yars old, and Elifaz rose up and went and took ten of his mother’s brothers with him and pursued Jacob.
34 And he followed in the way of Jacob, and he lurked for him in the border of the land of Kanaan opposite to the city of Shechem.
35 And Jacob saw Elifax and his men pursuing him, and Jacob stood still in the place in which he was going, in order to know what this was for he did not know the thing; and Elifaz drew his sword and he went on advancing, he and his men, toward Jacob; and Jacob said unto them, What is to do with you that you have come, and what means is that you pursue with your swords.
36 And Elifaz came near to Jacob and he answered and said unto him, Thus did my father command me, and now therefore I will not deviate from the orders which my father gave me; and when Jacob saw that Esau had spoken to Elifaz to employ force, Jacob then approached and supplicated Elifaz and his men, saying to him,
37 Behold all that I have and which my father and mother gave unto me, that take unto you and go from me, and do not slay me, and may this thing be accounted unto you a righteousness.
38 And Yahweh gave nto Jacob to find favor in the eyes of Elifaz the son of Esau, and his men, and they hearkened to the voice of Jacob, and they did not put him to death, and Elifaz and his men took all belonging to Jacob together with the silver and gold that he has brought with him from B’ersheva; they left him nothing.