Keturah, Abraham’s concubine, gave birth to the following sons: Zimran, Jokshan, Medan, Midian, Ishbak, and Shuah. Jokshan’s sons were Sheba and Dedan.
“God gave Abraham circumcision to confirm his promise. So when Abraham’s son Isaac was born, Abraham circumcised him on the eighth day. Isaac did the same to his son Jacob, and Jacob did the same to his twelve sons (the ancestors of our tribes).