Genesis 25:2-6

²She bore him Zimran, Jokshan, Medan, Midian, Ishbak, and Shuah. ³Jokshan became the father of Sheba, and Dedan. The sons of Dedan were Asshurim, Letushim, and Leummim. ⁴The sons of Midian: Ephah, Epher, Hanoch, Abida, and Eldaah. All these were the children of Keturah. ⁵Abraham gave all that he had to Isaac, ⁶but to the sons of the concubines who Abraham had, Abraham gave gifts. He sent them away from Isaac his son, while he yet lived, eastward, to the east country.