Imam Rida (peace be upon him): Muhammad ibn Abdullah al-Masma'i said: Ahmad ibn Hasan al-Maythami said: One day Imam Rida (peace be upon him) was asked a question while the companions of Imam Rida (peace be upon him) had gathered around him, and they were disputing about two differing hadiths that had come from the Prophet (peace be upon him and his family) concerning one and the same matter. Imam Rida (peace be upon him) said: Allah the Mighty and Majestic has made the lawful lawful and made the unlawful unlawful and made the obligatory obligatory. So whatever comes making lawful what Allah has made unlawful, or making unlawful what Allah has made lawful, or setting aside and removing an obligation that is in the Book of Allah — which someone has recorded, and that person is one who upholds the command of Allah and expounds it, and no abrogator from the Truth has come for that lawful, unlawful or obligation which this man has changed — then these are matters which it is not permissible to take up in the religion of Allah, because the Messenger of Allah (peace be upon him and his family) does not make unlawful what Allah has made lawful, and does not make lawful what Allah has made unlawful, and does not change the obligations and rulings of Allah. In all of this, the Messenger of Allah is a follower of Allah, and delivers the rulings and obligations from Allah to His creation in submission, and whatever he says he says from Allah. And this is the saying of the Truth Exalted: "I follow only what is revealed to me." (al-Ahqaf/9) So the Prophet of Allah (peace be upon him and his family) is a follower of Allah, and delivers from Allah what he is commanded with of the conveying of the message. I said: It happens sometimes that a hadith comes to us from you which you have narrated from the Messenger of Allah (peace be upon him and his family) about matters that are not in the Book of Allah but are in the Sunnah, and then something contrary to it comes from you. He said: It sometimes happens that he commanded certain things, so that command is obligatory and binding and obedience to it is definite, like the obligations of Allah, and his eminence in that command was following and conforming to the command of Allah. So whatever prohibition of unlawfulness comes from the Messenger of Allah (peace be upon him and his family) in any matter, and after it the opposite of that prohibition comes, it is not permissible to act on it; and likewise concerning what his eminence has commanded — for we do not permit what the Messenger of Allah (peace be upon him and his family) has not permitted, and we do not command contrary to what the Messenger of Allah (peace be upon him and his family) commanded, unless a necessity arises, such as fear. But as for making lawful what the Messenger of Allah has made unlawful, or making unlawful what the Messenger of Allah has made lawful — such a thing will never come to pass, because we are followers of the Messenger of Allah, and we submit to his command, just as the Messenger of Allah was a follower of the command of his Lord and submitted to His command. And the Truth Exalted has said: وَ ما آتاکُمُ الرَّسُولُ فَخُذُوهُ وَ ما نَهاکُمْ عَنْهُ فَانْتَهُوا [Whatever the Messenger gives you, take it; and whatever he forbids you from, refrain from it]. Whatever the Messenger of Allah brings, take it, and whatever his eminence forbids, accept it. And there are things which the Messenger of Allah forbids as a prohibition of dislike, not a prohibition of unlawfulness — meaning his eminence's intent in the prohibition is to express dislike — and things which he commands not by way of obligation and duty but by way of recommendation and preference in the religion. Then he grants dispensation in that command or prohibition to one who has an impediment and to one who has no impediment. So whatever from the Messenger of Allah is a prohibition of dislike or a recommendatory command, his eminence has granted dispensation in doing or leaving it. And when two reports come to you from us, one of the two reports commanding something and the other forbidding it, and one person has narrated both and has denied neither, and both this command and prohibition are of the dislike kind, and neither has been denied, and both these reports are sound and well known and their transmitters are all in agreement — in this case, taking up one of these two reports, or both, is obligatory. That is, you may hold to both together, or to whichever of them you wish. It is broad for you, from the standpoint of submitting to the word of the Messenger of Allah and referring the matter back to the Prophet and to us — meaning, not acting on either of the two reports, since it has been assumed that the command and prohibition are of the dislike kind, not of unlawfulness. But if someone leaves it out of obstinacy and denial, and refuses to submit to the command of the Messenger of Allah, he has associated a partner with Allah the Great. And any two reports that differ — meaning any two reports that are about obligation and unlawfulness, not about dislike — present those two reports to the Book of Allah; and whatever the lawful or unlawful of it is present in the Book of Allah, follow the report that agrees with the Book of Allah. And if it is not in the Book of Allah, present it to the reports and Sunnahs of the Messenger of Allah. So whatever in the Sunnahs of the Messenger of Allah is present as a prohibition of unlawfulness or as a binding command, follow what agrees with the prohibition or command; and whatever in the Sunnahs of the Messenger of Allah is present as a prohibition of dislike and the other report is contrary to it — this is a dispensation in doing what the Messenger of Allah found disliked and did not make unlawful. And this is what is broad for you: you may take up both together, or take up whichever you wish. You have the choice in accepting and submitting and referring back to the Messenger of Allah, or in not acting. And any report from us which you do not find in the Quran nor in the Sunnahs of the Prophet, refer its knowledge back to us — we are more worthy of it. Do not speak of it by your own opinions. It is incumbent upon you to hold yourselves back from being certain on your own, and from seeking and endeavouring to attain information; rather you must seek the exposition of it from us, and inquire.