It is related that al-Ma’mun sent Fadl ibn Sahl Dhu al-Riasatayn to al-Imam al-Reza (A.S.). He said to the Imam (A.S.): I would like you to compile for me(the precepts of) the lawful and the unlawful, obligatory rules, and traditions in one place, for you are Hujjah of Allah for the people and mine of the Knowledge. Imam al-Reza (A.S.) asked for paper and pen and told al-Fadl to write.
In The Name of Allah the Compassionate, the Merciful
It suffices us to bear witness that there is no God but Allah, who is the One and Only, and the Eternal, Absolute; He has neither a spouse nor children; He is Self-subsistent and Sighted; He is Powerful and Perpetual, and an Ever lasting Light; He is an Alim not an ignorant; He is a Powerful One from whom powerlessness is away; He is the Rich One who has no needs; He is a Judge who does no injustice; He has created everything, nothing is similar to Him; and nothing is contrary to Him nor is there anyone like unto Him.
Muhammad (S.A.W.) is His servant and Messenger, His trusted and chosen one among His servants, and the Master of the Messengers and the Seal of the Prophets. He is the superior of all worlds after whom there will come no prophet; his doctrine will not change nor transform, and whatever he has brought is evident truth. We confirm whatever Muhammad (S.A.W.) has brought and acknowledge the previous Divine Prophets and Messengers and Allah’s Proofs (Hujjahs), and confirm his truthful Book: “No falsehood can approach it from before or behind it: It is sent down by One full of Wisdom, worthy of all Praise” (41:42).
And that the Qur’an is the guardian of all other revealed books, and it is pure truth from the beginning to the end. We believe in its unequivalent and ambiguous verses, its specific and generic, its promises and admonitions, its abrogating and abrogated, and its information, and none of the creatures can bring its like; and that the guide and the proof next to him for believes and the authority to the Muslims and the talking Qur’an and the learned in ordinances, and his [the Prophet’s (S.A.W.)] brother, successor, and legatee, namely Amir al-Mu’minin (A.S.) who was for his Holiness (S.A.W.) like Aaron to Moses. He was the Imam of the Pious, pioneer of the fair-faced and the fair-handed and the fair footed, and leader of the faithful, and the best of the successors next to any Prophet; and followed by him are al-Hasan(A.S.) and al-Husayn(A.S.) [and others] one after another continued up to the present, and all are from the household of the Holy Prophet (S.A.W.), who are the most aware of the whole Book and the Tradition, and are the most Just in Judgment in every age, and the most meritorious of all to Imamate. They are the most firm handle, the Imams of guidance, and the authorities to the people of the world until Allah inherits the world and whatever in it, for He is the best of the inheritors. And [I bear witness] that anyone who contradicts them (the Ahl al-Bayt) is a misled robber who had put aside the truth and guidance. It is only they who are the expositors of the Qur’an and the preachers of the Holy Prophet’s (S.A.W.) words. Anyone who dies and does not get to know them and does not practice love and affection towards them in the name of them and fathers, he will die as a pagan.
Ahl al-Bayt (A.S.) in the Holy Qur’an and Hadith
By: Ayatullah Muhammadi Rayshahri