Genesis 25:5-26

Now Abraham gave everything that he had to Isaac; but to the sons of his concubines [Hagar and Keturah], Abraham gave gifts while he was still living and he sent them to the east country, away from Isaac his son [of promise]. The days of Abraham’s life were a hundred and seventy-five years. Then Abraham breathed his last and he died at a good old age, an old man who was satisfied [with life]; and he was gathered to his people [who had preceded him in death]. [Gen 15:15; Heb 11:13-16] So 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 east of Mamre, the field which Abraham purchased from the sons of Heth; there Abraham was buried with Sarah his wife. Now after the death of Abraham, God blessed his son Isaac; and Isaac lived at Beer-lahai-roi. Now these are the records of the descendants of Ishmael, Abraham’s son, whom Hagar the Egyptian, Sarah’s maid, bore to Abraham; and these are the names of the [twelve] sons of Ishmael, named in the order of their births: Nebaioth, the firstborn of Ishmael, and Kedar, Adbeel, Mibsam, Mishma, Dumah, Massa, Hadad, Tema, Jetur, Naphish, and Kedemah. These are the sons of Ishmael and these are their names, by their settlements, and by their encampments (sheepfolds); twelve princes (sheiks) according to their tribes. [Foretold in Gen 17:20] Ishmael lived a hundred and thirty-seven years; then he breathed his last and died, and was gathered to his people [who had preceded him in death]. Ishmael’s sons (descendants) settled from Havilah to Shur which is east of Egypt as one goes toward Assyria; he settled opposite (east) of all his relatives. Now these are the records of the descendants of Isaac, Abraham’s son: Abraham was the father of Isaac. Isaac was forty years old when he married Rebekah, the daughter of Bethuel the Aramean (Syrian) of Paddan-aram, the sister of Laban the Aramean. Isaac prayed to the LORD for his wife, because she was unable to conceive children; and the LORD granted his prayer and Rebekah his wife conceived [twins]. But the children struggled together within her [kicking and shoving one another]; and she said, “If it is so [that the LORD has heard our prayer], why then am I this way?” So she went to inquire of the LORD [praying for an answer]. The LORD said to her, “[The founders of] two nations are in your womb; And the separation of two nations has begun in your body; The one people shall be stronger than the other; And the older shall serve the younger.” When her days to be delivered were fulfilled, behold, there were twins in her womb. The first came out reddish all over like a hairy garment; and they named him Esau (hairy). Afterward his brother came out, and his hand grasped Esau’s heel, so he was named Jacob (one who grabs by the heel, supplanter). Isaac was sixty years old when Rebekah gave birth to them.