TSK · Genesis 25:19

And Abraham called the name of his son that was born unto him, whom Sarah bare to him, Isaac.

Now the sons of Keturah, Abraham's concubine: she bare Zimran, and Jokshan, and Medan, and Midian, and Ishbak, and Shuah. And the sons of Jokshan; Sheba, and Dedan.

Abraham begat Isaac; and Isaac begat Jacob; and Jacob begat Judas and his brethren;

And he gave him the covenant of circumcision: and so [Abraham] begat Isaac, and circumcised him the eighth day; and Isaac [begat] Jacob; and Jacob [begat] the twelve patriarchs.