Ijma
Ijma is an Arabic term referring to the consensus or agreement of the Islamic community on a point of Islamic law. Sunni Muslims regard it as one of the secondary sources of Sharia law, after the Qur'an, and the Sunnah.
Exactly what group should represent the Muslim community in reaching the consensus is not agreed on by the various schools of Islamic jurisprudence. Some believe it should be the Sahaba only; others the consensus of the Salaf ; or the consensus of Islamic lawyers, the jurists and scholars of the Muslim world, i.e. scholarly consensus; or the consensus of all the Muslim world, both scholars and lay people.
It was the consensus that could in principle elevate a ruling based on probable evidence to absolute certainty. This classical doctrine drew its authority from a series of hadiths stating that the Islamic community could never agree on an error. This form of consensus was technically defined as agreement of all competent jurists in any particular generation, acting as representatives of the community. However, the practical difficulty of obtaining and ascertaining such an agreement meant that it had little impact on legal development. A more pragmatic form of consensus, which could be determined by consulting works of prominent jurists, was used to confirm a ruling so that it could not be reopened for further discussion. The cases for which there was a consensus account form less than 1 percent of the body of classical jurisprudence.
The opposite of Ijma is called ikhtilaf.
Proof of the validity of Ijma
In the Quran
was once approached by an old man who asked for proof of Ijma from the Quran. Imam Al-Shafi'i went home and recited the whole Quran three times. On the third recitation, he found a verse in Sura An-Nisa"And whoever defies the Messenger after guidance has become clear to them and follows a path other than that of the believers, We will let them pursue what they have chosen, then burn them in Hell—what an evil end!"which mentions the word 'Sabeelil Mu'mineen'. Imam Al-Shafi'i told the old man this verse was a proof for Ijma from the Quran and he was satisfied.
Another proof of Ijma from the Quran is in Surah Luqman in which Allah mentions
"and follow the way of those who turn to Me in devotion"Another proof of Ijma in the Quran is in Sura an-Nisa in which Allah mentions
"And when they hear news of security or fear, they publicize it. Had they referred it to the Messenger or their authorities, those with sound judgment among them would have validated it. Had it not been for Allah’s grace and mercy, you would have followed Satan—except for a few."Some scholars have the opinion that Surah Al Fatihah verse and which Muslims read at least 17 times a day is also an indirect support of Ijma.
In the Hadith (Sayings of the Prophet)
The hadith of Muhammad which states that "Allah will ensure my ummah will never collude en-masse upon error" have been mentioned in the books of Tirmidhi, Ibn Majah, Musnah Ahmad, and Darimi. This is often quoted as the primary proof of Ijma from the Hadith from the Sunni View.Similar hadiths are often cited as a proof for the validity of Ijma as well.
Usage
Sunni view
Sunni scholars argued that the nature of human society was such that a community could not mistakenly agree that a statement had been made, and further that the consensus of the ummah about its inability to agree upon an error in itself certified the authenticity of this hadith. Sunni Muslims and Scholars regard ijmā' as one of the secondary sources of Sharia law, just after the divine revelation of the Qur'an, and the prophetic practice known as Sunnah. Thus so a position of Majority should always be taken into consideration, when a matter cannot be concluded from the Qur'an or Hadith.There are differing views over who is considered a part of this consensus, whether "the consensus is needed only among the scholars of a particular school, or legists, or legists of an early era, or the Companions, or scholars in general, or the entire Muslim community."
Malik ibn Anas held the view that the religiously binding consensus was only the consensus of Muhammad's companions and the direct successors of those companions in the city of Medina.
According to Iraqi academic Majid Khadduri, Al-Shafi'i held the view that religiously binding consensus had to include all of the Muslim community in every part of the world, both the religiously learned and the layman. Thus, if even one individual out of millions would hold a differing view, then consensus would not have been reached. In an attempt to define consensus in a form which was more likely to ever occur, Al-Ghazali expanding on al-Shafi'i's definition to define consensus as including all of the Muslim community in regard to religious principles and restricting the meaning to only the religiously learned in regard to finer details.
Abu Hanifa, Ahmad ibn Hanbal and Dawud al-Zahiri, on the other hand, considered this consensus to only include the companions of Muhammad, excluding all generations which followed them, in Medina and elsewhere.
Views within Sunni Islam branched off even further in later generations, with Abu Bakr Al Jassas, a hanafi scholar, defining even a simple majority view as constituting consensus and Ibn Taymiyyah restricting consensus to the view of the religiously learned only. Muhammad ibn Jarir al-Tabari's position was not entirely clear, as modern scholarship has attributed to him both the view that consensus means a simple majority, and that it means only the consensus of the companions of Muhammad.
According to Ahmad Hasan, the majority view is split between two possibilities: that religiously binding consensus is the consensus of the entire Muslim community, or that religiously binding consensus is just the consensus of the religiously learned. The names of two kinds of consensus are:
- ijma al-ummah - a whole community consensus.
- ijma al-aimmah - a consensus by religious authorities.
Shia view