Genesis 25:1-10

Abraham took another wife, whose name was Keturah. She gave birth to Zimran, Jokshan, Medan, Midian, Ishbak, and Shuah. Jokshan was the father of Sheba and Dedan. The sons of Dedan were Asshurim, Letushim, and Leummim. The sons of Midian were Ephah, Epher, Hanoch, Abida, and Eldaah. All these were the sons of Keturah. 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.