And after that came forth his brother, and his hand had hold on Esau's heel; and his name was called Jacob: and Isaac was threescore years old when she bare them.
Of the children of Judah, their generations, by their families, by their fathers' houses, according to the number of the names, from twenty years old and upward, all that were able to go forth to war;
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 the twelve patriarchs.