Genesis 25:2-6

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

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

4And the sons of Midian were Ephah, and Epher, and Enoch, and Abida, and Eldaah. All these were sons of Keturah.

5And Abraham gave all that he had to Isaac.

6And to the sons of the concubines that Abraham had, Abraham gave gifts, and, while he yet lived, sent them away from Isaac his son, eastward to the east country.