I guess You can do anything, You chose Isaac’s wife and when You choose something or someone, that’s it, it’s a done deal. 

Abraham’s pretty old now, what’s going on with him? 

“Then again Abraham took a wife, and her name was Keturah” (Gen 25:1). 

They had children and grandchildren, but they are never mentioned them.

“And Abraham gave all that he had unto Isaac.  But unto the sons of the concubines, which Abraham had, Abraham gave gifts, and sent them away from Isaac his son, while he yet lived, eastward, unto the east country.

And these are the days of the years of Abraham’s life which he lived, an hundred ¹ threescore and fifteen years.  Then Abraham gave up the ghost, and died in a good old age, an old man, and full of years; and was gathered to his people” (Gen 25:7-8).

Ishmael had children and died at the age of 137 (Gen 25:12-18)

Isaac was 40 when married Rebekah (Gen 25:20).

“And Isaac entreated the LORD for his wife, because she was barren: and the LORD was entreated of him, and Rebekah his wife conceived. 

And the children struggled together within her; and she said, If it be so, why am I thus?  And she went to enquire of the LORD. 

And the LORD said unto her, Two nations are in thy womb, and two manner of people shall be separated from thy bowels; and the one people shall be stronger than the other people; and the elder shall serve the younger.

And when her days to be delivered were fulfilled, behold, there were twins in her womb. 

And the first came out red, all over like an hairy garment; and they called his name Esau. 

And after that came his brother out, and his hand took hold on Esau’s heel; and his name was called Jacob: and Isaac was threescore (60) years old when she bare them.

And the boys grew: and Esau was a cunning hunter, a man of the field; and Jacob was a plain man, dwelling in tents. 

And Isaac loved Esau, because he did eat of his venison: but Rebekah loved Jacob.

And Jacob sod pottage: and Esau came from the field, and he was faint:

And Esau said to Jacob, Feed me, I pray thee, with that same red pottage; for I am faint: therefore was his name called Edom. 

And Jacob said, Sell me this day thy ²birthright. 

And Esau said, Behold, I am at the point to die: and what profit shall this birthright do to me? 

And Jacob said, Swear to me this day; and he swear unto him: and he sold his birthright unto Jacob. 

Then Jacob gave Esau bread and pottage of lentils; and he did eat and drink, and rose up, and went his way: thus Esau despised his birthright” (Gen 25:21-34).

¹ Score = 20, so threescore is 60.

² Under the ancient law of primogeniture the birthright always belongs to the firstborn and it’s like money in the bank.  The proprietor of said right automatically has: headship of the family, priestly functions in the family, inheritance of property, and possession of the covenant promise.

This is not God’s law, but man’s law. God chooses as He pleases – see Rom 9:10-13.

Esau selling this birthright to Jacob is recorded in the Nuzi texts of around 1500 B.C.  According to the Babylonian or Persian texts of the first millennium B.C., the selling of one’s birthright seemed to have been common or at least similar.

Heber, the fifth from Noah, lived longer than anyone after the flood, 430 years.  And from him Abraham became the first person surnamed a Hebrew.

Jacob/Isaiah

Jacob was the son of Isaac and Rebekah, and the twin brother of Esau (Genesis 25:23-26).  Jacob, meaning “grabber”, was born clutching Esau’s heel.  He   eventually received his father’s blessing that was meant for Esau.  Cheated by his brother, Esau vowed to kill Jacob (Genesis 27:41).  Jacob  left his home and went to the town of Padan Aram, where his Uncle Laban lived.

At the outset of his journey, near Bethel, Jacob was given a vision by God about Israel’s future, which would be that the Jews would: establish their own nation, be scattered like dust to the ends of the earth, have a worldwide impact, and one day return to their homeland.  All of these things of course have happened, long after the prophecy from Jacob was written down.

After working seven years as a herdsman for his uncle Jacob wanted to marry Laban’s youngest daughter Rachel.  But Laban deceived Jacob by giving him his eldest daughter, Leah, in marriage. Jacob consented to work another seven years for the permission to marry Rachel.

Leah bore Jacob four sons, Reuben, Simeon, Levi, and Judah.  Rachel, who was barren, gave her maid, Bilhah, to bear Jacob’s children for her.  Bilhah bore Dan and Naphtali.  Leah likewise gave Jacob her maid, Zilpah, who bore him Gad and Asher. Afterwards Leah gave birth to Issachar and Zebulun, and Jacob’s only daughter, Dinah.  Only then did Rachel conceive, bearing Joseph.

Jacob packed up his large family and went back to Canaan.  On that trip, at night Jacob wrestled with an angel, asking for a blessing.  At last the angel blessed him and gave him a new name: Israel (“You have struggled with God.”).  Jacob made amends with his brother Esau.  Rachel died in childbirth of Jacob’s last son, Benjamin.

Jacob settled again in the land of Canaan.  After some years, his son Joseph became a high ranking official in Egypt.  Jacob and his family moved to Egypt and lived there.  Jacob blessed Joseph’s two sons Ephraim and Manasseh.  When Jacob died, his body was taken back to Canaan for burial.  The 12 sons of Jacob (Israel) became the twelve tribes of Israel.  They multiplied greatly in Egypt for 400 years, and returned to Canaan with Moses during the Exodus.