The had no descendant.

The had no descendant. It is acknowledged that descendants are from the male side and not from the female side. You belong to the generation of his daughter." The Imam recited verses 84-85 from Chapter VI of the Holy Qur'an: “And, We gave to him Isaac and Jacob; each did We guide, and Noah did We guide before, and of his descendants David and Solomon and Job and Joseph and Aaron; and thus do We reward those who do good.

And, Zakariyya and John and Jesus and Elias; every one was of the good." (6:84-85) The Imam asked the caliph: "Who was Jesus's father?" Harun replied that Jesus had no father. The Imam said: "There was no one, and yet Allah included Jesus in the progeny of the prophets through Mary. Similarly, He has included us in the progeny of the Holy Prophet through our ancestor Bibi Fatima." Moreover, Imam Fakhru'd-Din Razi, in his Tafsir al-Kabir (Great Commentary), Bk IV, P.

124, Problem V, says regarding this verse that the verse proves that Hasan and Husain are the descendants of the Prophet of Islam. Since in this verse God has verified Jesus as a descendant of Abraham, and Jesus had no father, this relationship is from the side of the mother. In the same manner, Hasan and Husain are truly the descendants of the Prophet. Imam Musa Kazim asked Harun if he wanted further proof.

The caliph asked the Imam to continue.The Imam read verse 60 from Chapter III, "Aal-’Imran,"of the Holy Qur'an: "But, whoever disputes with you in this matter after what has come to you of knowledge, then say: come, let us call our sons and your sons and our women and your women and our selves, and your selves, then let us be earnest in prayer and pray for the curse of Allah on the liars." (3:61) He continued, saying that no one has ever claimed that on the occasion of the spiritual contest (Mubahala) against the Christians of Najran that the Prophet took with him anyone except ‘Ali Ibn Abu Talib, Fatima, Hasan, and Husain.

It follows, therefore that "selves" (anfusana) means ‘Ali Ibn Abi Talib. "Women"(nisa'ana) means Fatima and "sons" (abna'ana) means Hasan and Husain whom Allah has identified as the Prophet's own sons. Upon hearing this argument, Harun exclaimed, "Bravo, O Abu'l-Hasan." Clearly, this reasoning proves that Hasan and Husain are the sons of the Prophet and that the ‘Sa'dat Fatima’ (descendants of Bibi Fatima) are of the progeny of the Holy Prophet.