Some Ans. Questions 1908 by -'Abdu'l-Bahá- 1 Para

Besides this, an especial blessing is conferred on some families and some generations. Thus it is an especial blessing that from among the descendants of Abraham should have come all the Prophets of the children of Israel. This is a blessing that God has granted to this descent: to Moses from His father and mother, to Christ from His mother's line; also to Muhammad and the Bab, and to all the Prophets and the Holy Manifestations of Israel. The Blessed Beauty is also a lineal descendant of Abraham, for Abraham had other sons besides Ishmael and Isaac who in those days migrated to the lands of Persia and Afghanistan, and the Blessed Beauty is one of their descendants (213:2)

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