Abraham takes another wife - Keturah.
(And has six more sons.)
Then again Abraham took
a wife, and her name was Keturah.
And she bare him
Zimran, and Jokshan, and Medan, and Midian, and Ishbak, and Shuah.
And Jokshan begat Sheba, and Dedan. And the sons of Dedan were Asshurim,
and Letushim, and Leummim.
And the sons of Midian; Ephah, and Epher, and Hanoch, and Abidah, and
Eldaah. All these were the children of Keturah.
Abraham dies, giving all his possessions to Isaac.
(Ignoring his other seven sons and unmentioned daughters.)
And Abraham gave all that he had unto Isaac.
Abraham gave everything he had to Isaac. 
But unto the sons of
the concubines, which Abraham had, Abraham gave gifts, and
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 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.
And his sons Isaac and Ishmael buried him in the cave of Machpelah, in the
field of Ephron the son of Zohar the Hittite, which is before Mamre;
The field which Abraham purchased of the sons of Heth: there was Abraham
buried, and Sarah his wife.
And it came to pass after the death of Abraham, that God blessed his son
Isaac; and Isaac dwelt by the well Lahairoi.
The generations of Ishmael
Now these are the generations of Ishmael, Abraham's son, whom Hagar the
Egyptian, Sarah's handmaid, bare unto Abraham:
And these are the names of the sons of Ishmael, by their names, according
to their generations: the firstborn of Ishmael, Nebajoth; and Kedar, and
Adbeel, and Mibsam,
And Mishma, and Dumah, and Massa,
Hadar, and Tema, Jetur, Naphish, and Kedemah:
These are the sons of Ishmael, and these are their names, by their towns,
and by their castles; twelve princes according to their nations.
Now these are the generations of Ishmael....
And these are the years of the life of Ishmael, an hundred and thirty and
seven years: and he gave up the ghost and died; and was gathered unto his
And they dwelt from Havilah unto Shur, that is before Egypt, as thou goest
toward Assyria: and he died in the presence of all his brethren.
The birth of Isaac's sons, Esau and Jacob
And these are the generations of Isaac, Abraham's son: Abraham begat
And Isaac was forty years old when he took Rebekah to wife, the daughter
of Bethuel the Syrian of Padanaram, the sister to Laban the Syrian.
And Isaac intreated the LORD for his wife, because she was barren: and the
LORD was intreated of him, and Rebekah his wife conceived.
25:22 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.
The twins struggled in Rachel's womb. So she asked God about it.
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.
God said to her,
Two nations are in your womb, and two different kinds of people will come out of it.
One kind will be stronger than the other, and the older will serve the younger.
And the first came out red, all over like an hairy garment; and they
called his name Esau.
Esau was the first to come out. He was red and hairy all over.
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 years old when
she bare them.
When his brother came out he grabbed on to Esau's heel. He was named Jacob.
And the boys grew: and Esau was a cunning hunter, a man of the field; and
Jacob was a plain man, dwelling in tents.
Esau grew to be a cunning hunter, while Jacob was a plain man who lived in tents.
And Isaac loved Esau, because he did eat of his venison:
but Rebekah loved Jacob.
Isaac loved Esau because Esau was a hunter and Isaac loved venison.
Rebekah loved Jacob. 
Esau sells his inheritance for a bowl of lentil soup.
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.
One day when Jacob was making pottage, Esau came in from the field.
Esau was tired and hungry, so he said to Jacob,
Please feed me some of that red pottage, because I am tired and hungry.
And Jacob said, Sell me this day thy birthright.
Okay, if you'll sell me your birthright.
And Esau said, Behold, I am at the point to die: and what profit shall
this birthright do to me?
Well, since I'm about to die, what good will my birthright do me?
And Jacob said, Swear to me this day; and he sware unto him: and he sold
his birthright unto Jacob.
Swear to me.
And Esau sold his birthright to Jacob.
Then Jacob gave Esau bread and pottage of lentiles; and he did eat and
drink, and rose up, and went his way: thus Esau despised his birthright.
Then Jacob gave Esau some bread and a lentil pottage.
Esau ate what Jacob gave him. "Thus Esau despised his birthright."
- Abraham needed God's help to father Isaac when
he was 100 years old (Gen 21:1-2, Rom 4:19,
But here, when he is even older, he manages to have six more children without
any help from God.
Since Abraham had so many sons, why does the bible say that he had only one?
- Abraham gave everything he owned to Isaac -- ignoring his other sons (Ishmael, Zimran, Jokshan, Medan,
Midian, Ishbak, and Shuah), as well as all of his nameless and unmentioned daughters, along with God knows how many
other children he had with his other concubines, and the wives and concubines themselves.
- The concubines, which Abraham had
How many concubines did Abraham have? The Bible mentions Hagar and Keturah, but were there others?
- In the Bible it's always the women that are "barren", never the men.
And when God "opens their womb," the resulting babies are always little boys.
- God liked Jacob better than hated Esau, too. In fact he hated Esau.
No reason is given for why one son is loved while
the other is hated. But since God chose to act this way, it must have been as an example for parents to follow.
Have you decided which of your children to hate?
- Dwindling in Unbelief
- Happy Birthday Edna
(You're still a youngster by biblical standards) (Genesis 25:7, 17)
- Why did God hate Esau? (25:25,
- OMGWTFBible: In the Beginning - Episode 10 - (Genesis 25:1 - 26:33)
- Episode 10 of the OMGWTFBIBLE podcast. Contains chapters 13-17. In which Avraham has some more kids nobody cares about,
a stew gets going, and a plotline is recycled for the third time. Recorded live at Double Wide Bar on July 29, 2013. Guest: Ariel Abrahams
- Slate Blogs the Bible by David Plotz
- The Silence of Isaac
- David Mamet's Favorite Bible Story
- The Bible (Annotated)
- Genesis 25. More bowel-babies. Twins no less.
- Christian Response
The Annotated Skeptic's Annotated Bible
twins were in her womb (Gen 25)
Drunk With Blood: Genesis