Genesis 25:4-8

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

And Abraham gave all that he had unto Isaac.

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.

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.