Genesis 25:1-4

Now Abraham had taken another wife, whose name was Keturah. She and Abraham had sons named Zimran, Jokshan, Medan, Midian, Ishbak, and Shuah. Jokshan was the father of Sheba and Dedan. Dedan’s sons were the Ashurites, the Letushites, and the Leummites. Midian’s sons were Ephah, Epher, Hanoch, Abida, and Eldaah. All these were the descendants of Keturah.