1Then again Abraham took a wife, and her name was Keturah.

2 And she bare him Zimran, and Jokshan, and Medan, and Midian, and Ishbak, and Shuah.

3 And Jokshan begat Sheba, and Dedan. And the sons of Dedan were Asshurim, and Letushim, and Leummim.

4 And the sons of Midian; Ephah, and Epher, and Hanoch, and Abidah, and Eldaah. All these were the children of Keturah.

5 And Abraham gave all that he had unto Isaac.

6 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.

7 And these are the days of the years of Abraham's life which he lived, an hundred threescore and fifteen years.

8 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.

9 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;

10 The field which Abraham purchased of the sons of Heth: there was Abraham buried, and Sarah his wife.

11 And it came to pass after the death of Abraham, that God blessed his son Isaac; and Isaac dwelt by the well Lahairoi.

Source: Bible, excerpts copied from the International Bible Society
https://www.biblica.com/bible/kjv/genesis/25/

SUMMARY OF THE REMAINING OF THE CHAPTER:

Among the sons of Abraham was Isaac. He had Esau and Jacob. Two twins were born because of Isaac praying to God, since Rebekah could not have children.
God said that two enemy nations will be born and that one will be stronger than the other. He also said that the oldest will be dominated by the younger.
Jacob was given this unborn name by his brother Esau's heel. In addition, he succeeded in getting Esau to change his elder son's rights to a plate of food. Esau despised his rights as an eldest son.