Now the sons born to Keturah, Abraham's concubine, [were] Zimran, Jokshan, Medan, Midian, Ishbak, and Shuah. The sons of Jokshan [were] Sheba and Dedan.

Abraham begot Isaac, Isaac begot Jacob, and Jacob begot Judah and his brothers.

[the son] of Jacob, [the son] of Isaac, [the son] of Abraham, [the son] of Terah, [the son] of Nahor,

"Then He gave him the covenant of circumcision; and so [Abraham] begot Isaac and circumcised him on the eighth day; and Isaac [begot] Jacob, and Jacob [begot] the twelve patriarchs.