Genesis 25:1-6

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. Abraham gave all that he possessed to Isaac, but to his sons by his concubines he gave gifts while he was still living. He sent them all away eastward, separating them from his son Isaac.