ভূমিকা
Shiavault - a Vault of Shia Islamic Books Al-'imam Al-rida [a] and the Heir Apparency Supplement The conditions laid down by al-Rida (A) had frustrated al-Ma'mun's plan. We believe that al-Ma'mun did not expect these conditions, for the success of his plan depended on the Imam entering the network of the alliances of power and becoming entangled in its problems and hostilities.
This would result in people making accusations against him and directing their anger towards him, thus tarnishing his pure and sacred image among them. In this way al-Ma'mun would achieve his aim of transforming the formula of nass, if he could not be included in it, into a mere political formula, and he would display the Imam as a worldly person and political maneuverer.
Al-'Imam al-Rida (A) had avoided falling into this trap by setting these conditions, which transformed him from being a partner of al-Ma'mun - as the heir apparency made necessary - to being a witness against him and one of his victims.
In his speech made before al-Ma'mun and important state officials, influential people, notables from among the leaders of public opinion, and others after the Imam was paid allegiance to as heir apparent, the Imam (A) confined himself to saying: We have a right over you through the Messenger of Allah, and you have a right over us through him; so if you have fulfilled that (our right) towards us, we must (fulfil) the right towards you.
The substance of this statement was repeated in many of his replies and discussions, like his comparison of his own and al-Ma'mun's positions to those of the Prophet Joseph and the king of Egypt, and like his statement: Whosoever follows the Messenger of Allah is entitled to receive from him.
His many letters and discussions in which he constantly affirmed the formula of nass, of which is a letter about the articles of faith which he had written in answer to a request from al-Ma'mun: The Imam is the proof of Allah over His creation and the source of His knowledge, and obedience to him is incumbent. These are some examples of his statements and actions with which he confronted al-Ma'mun's plan, and a researcher will certainly come across many others.
In order to clarify this and other issues in the life of al-'Imam al-Rida (A), it would be very useful to examine, classify and analyze all the legislative and instructive texts which originated from him during the heir apparency, and to compare them with those which pertain to the period before it.