1Abraham took another wife, and her name was Keturah. 2She bore him Zimran, Jokshan, Medan, Midian, Ishbak, and Shuah. 3Jokshan became the father of Sheba, and Dedan. The sons of Dedan were Asshurim, Letushim, and Leummim. 4The sons of Midian were Ephah, Epher, Hanoch, Abida, and Eldaah. All these were the children of Keturah. 5Abraham gave all that he had to Isaac, 6but Abraham gave gifts to the sons of Abraham’s concubines. While he still lived, he sent them away from Isaac his son, eastward, to the east country. 7These are the days of the years of Abraham’s life which he lived: one hundred seventy-five years. 8Abraham gave up his spirit, and died at a good old age, an old man, and full of years, and was gathered to his people. 9Isaac and Ishmael, his sons, buried him in the cave of Machpelah, in the field of Ephron, the son of Zohar the Hittite, which is near Mamre, 10the field which Abraham purchased from the children of Heth. Abraham was buried there with Sarah, his wife. 11After the death of Abraham, God blessed Isaac, his son. Isaac lived by Beer Lahai Roi.
12Now this is the history of the generations of Ishmael, Abraham’s son, whom Hagar the Egyptian, Sarah’s servant, bore to Abraham. 13These are the names of the sons of Ishmael, by their names, according to the order of their birth: the firstborn of Ishmael, Nebaioth, then Kedar, Adbeel, Mibsam, 14Mishma, Dumah, Massa, 15Hadad, Tema, Jetur, Naphish, and Kedemah. 16These are the sons of Ishmael, and these are their names, by their villages, and by their encampments: twelve princes, according to their nations. 17These are the years of the life of Ishmael: one hundred thirty-seven years. He gave up his spirit and died, and was gathered to his people. 18They lived from Havilah to Shur that is before Egypt, as you go toward Assyria. He lived opposite all his relatives.
19This is the history of the generations of Isaac, Abraham’s son. Abraham became the father of Isaac. 20Isaac was forty years old when he took Rebekah, the daughter of Bethuel the Syrian of Paddan Aram, the sister of Laban the Syrian, to be his wife. 21Isaac entreated Yahweh for his wife, because she was barren. Yahweh was entreated by him, and Rebekah his wife conceived. 22The children struggled together within her. She said, “If it is like this, why do I live?” She went to inquire of Yahweh. 23Yahweh said to her,
“Two nations are in your womb.
Two peoples will be separated from your body.
The one people will be stronger than the other people.
The elder will serve the younger.”
24When her days to be delivered were fulfilled, behold, there were twins in her womb. 25The first came out red all over, like a hairy garment. They named him Esau. 26After that, his brother came out, and his hand had hold on Esau’s heel. He was named Jacob. Isaac was sixty years old when she bore them.
27The boys grew. Esau was a skillful hunter, a man of the field. Jacob was a quiet man, living in tents. 28Now Isaac loved Esau, because he ate his venison. Rebekah loved Jacob. 29Jacob boiled stew. Esau came in from the field, and he was famished. 30Esau said to Jacob, “Please feed me with some of that red stew, for I am famished.” Therefore his name was called Edom.
31Jacob said, “First, sell me your birthright.”
32Esau said, “Behold, I am about to die. What good is the birthright to me?”
33Jacob said, “Swear to me first.”
He swore to him. He sold his birthright to Jacob. 34Jacob gave Esau bread and lentil stew. He ate and drank, rose up, and went his way. So Esau despised his birthright.
Jacob was the son of Isaac and Rebekah, born immediately after Esau, and Abraham was his grandfather. He achieved the right of the firstborn by trickery, in offering his older brother, Esau, food in exchange for the birthright, who cared little for this position. He also received the blessing of firstborn from his father Jacob before his death by cunning, and with the assistance of his mother Rebekah.
After his deception of Esau, receiving the blessing from his father, Jacob escaped to his uncle Laban, who in turn deceived Jacob into working for fourteen years for the marriage of Jacob to Leah, and then his beloved Rachel. Laban also sought to deceive Jacob of wages, but God intervened to ensure he would prosper. In a time of trial, when he feared the wrath of Esau, upon returning to the land of Canaan, Jacob had an encounter with God, and his name was changed to Israel, the one who wrestles with God. Even though his early life was characterized by deception, God worked through the situation to ensure that Jacob would be the one in the line of the patriarchs, to create a great nation and ultimately fulfill His purposes in the earth, especially through the future Messiah. The Messiah would guarantee the promise of the land to Abram and a person who would rule over Abraham's descendants, but also He would bring blessings to all the people of the earth (Gen 12:1-3).
In spite of Jacob's early failure by deception, God worked through him, and finally, Jacob became a different type of man after his struggle with God. As one has said,
"Despite Jacob’s faults, God chose him to be the leader of a great nation that still bears his name today. But for this, it is unlikely that we would know much about Jacob, who appears to be in the middle of events while the key players are those around him. There is no great wisdom or bravery in Jacob to speak of, and we are tempted to see him as little more than God’s passive instrument. If we are tempted to think that, because we aren’t in the spotlight performing great acts for God, we are unimportant to Him, then we should consider the life of Jacob and know that, in spite of our failings, God can and will still use us in His plan."
For more on Jacob, see "Who was Jacob in the Bible?", https://www.gotquestions.org/life-Jacob.html