Now the sons of Keturah, Abraham’s concubine: she bore Zimran, and Jokshan, and Medan, and Midian, and Ishbak, and Shuah. And the sons of Jokshan; Sheba, and Dedan.
And he gave him the covenant of circumcision: and so Abraham begot Isaac, and circumcised him the eighth day; and Isaac begot Jacob; and Jacob begot the twelve patriarchs.