1 Chronicles 1:32-33

The sons of Keturah, Abraham’s concubine, were Zimran, Jokshan, Medan, Midian, Ishbak, and Shuah. The sons of Jokshan were Sheba and Dedan. The sons of Midian were Ephah, Epher, Hanoch, Abida, and Eldaah. All these were descendants of Abraham through his concubine Keturah.