Hadith studies in the context of "Rashid Ahmad Gangohi"

In the Islamic study of hadith, an isnād (chain of transmitters, or literally "supporting"; Arabic: اِسْناد) refers to a list of people who passed on a tradition, from the original authority to whom the tradition is attributed to, to the present person reciting or compiling that tradition. The tradition an isnad is associated with is called the matn. Isnads are an important feature of the genre of Islamic literature known as hadith and are prioritized in the process that seeks to determine if the tradition in question is authentic or inauthentic.

According to the traditional Islamic view, the tradition of the hadith sciences has succeeded in the use of isnads to distinguish between authentic and inauthentic traditions going back to Muhammad and his companions. The contemporary view in modern hadith studies, however, is that isnads were commonly susceptible to forgery and so had to be scrutinized before being used to guarantee the transmission of a tradition.

Sahih Hadith (Arabic: الحديث الصحيح, al-Hadith al-Ṣaḥīḥ) in Hadith terminology, may be translated as "authentic hadith (prophetic narration)" or "sound hadith (prophetic narration)". Ibn Hajar defines a hadith that is ṣaḥīḥ lidhātihi ("ṣaḥīḥ in and of itself") as a singular narration (ahaad; see below) conveyed by a trustworthy, completely competent person, either in his ability to memorize or to preserve what he wrote, with a muttaṣil ("connected") isnād ("chain of narration") that contains neither a serious concealed flaw (ʻillah, Arabic:علة) nor irregularity (shādhdh). He then defines a hadith that is ṣaḥīḥ lighairihi ("ṣaḥīḥ due to external factors") as a hadith "with something, such as numerous chains of narration, strengthening it." In the Sunni branch of Islam, the canonical hadith collections are the six books (Kutub al-Sittah) listed below.

Ahmad ibn Hanbal (Arabic: أحمد ابن حنبل, romanized: Aḥmad ibn Ḥanbal; (164-241 AH; 780 – 855 CE) was an Arab jurist and founder of the Hanbali school who is widely recognized as the scholar who memorized the most Hadiths in Islamic history. One of the most venerated Islamic intellectual figures, ibn Hanbal is notable for his unmatched memorization of over one million prophetic narrations, an unprecedented number that has never been claimed by any other muhaddith. Ibn Hanbal also compiled the largest hadith collection, al-Musnad, which has continued to exercise considerable influence on the field of hadith studies up to the present time, shaping the methodological framework later employed in both Sahih Bukhari and Sahih Muslim. Imam al-Dhahabi described him as “the true Imam, the proof of the religion, the master of hadith, and the leader of the Sunnah”. Imam Ali ibn al-Madini said: “Truly, Allah supported this religion through two men, to whom there is no third: Abu Bakr during the Ridda Wars, and Ahmad ibn Hanbal during the Mihna”.

Having studied jurisprudence and hadith under many teachers during his youth, Ibn Hanbal became famous in his later life for the crucial role he played in the Mihna instituted by the Abbasid caliph al-Ma'mun toward the end of his reign, in which the ruler gave official state support to the Mu'tazili doctrine of the Quran being created, a view that contradicted the orthodox position of the Quran being the eternal, uncreated word of God. Living in poverty throughout his lifetime working as a baker, and suffering physical persecution under the caliphs for his unflinching adherence to the traditional doctrine, Ibn Hanbal's fortitude in this particular event only bolstered his "resounding reputation" in the annals of Sunni history.

Al-Shafi'i (Arabic: الشَّافِعِيّ, romanized: al-Shāfiʿī; IPA: [a(l) ʃaːfiʕiː] ;767–820 CE) was a Muslim scholar, jurist, muhaddith, traditionist, theologian, ascetic, and eponym of the Shafi'i school of Sunni Islamic jurisprudence. He is known to be the first to write a book upon the principles of Islamic jurisprudence, having authored one of the earliest work on the subject: al-Risala. His legacy and teaching on the matter provided it with a systematic form, thereby "fundamentally influencing the succeeding generations which are under his direct and obvious impact," and "beginning a new phase of the development of legal theory."

Born in Gaza, Palestine, to the Banu Muttalib clan of the Quraysh tribe, he relocated at the age of two and was raised in Mecca. He later resided in Medina, Yemen, Baghdad in Iraq, and Egypt, and also served as a judge for some time in Najran.

Ignác (Yitzhaq Yehuda) Goldziher (22 June 1850 – 13 November 1921), often credited as Ignaz Goldziher, was a Hungarian scholar of Islam. Alongside Joseph Schacht and G.H.A. Juynboll, he is considered one of the pioneers of modern academic hadith studies.

His most important work is the two-volume Muhammedanische Studien (Muslim Studies), especially its second volume, which addresses questions of the origins, evolution, and development of hadith.

Nafi bin Sarjis Abu Abdullah ad-Dailami (Arabic: نافع بن سارجيس أبو عبد الله الديلمي), also known as Nafi` Mawla ibn `Umar (Arabic: نافع مولى بن عمر), was a scholar of Fiqh jurisprudence and muhaddith from the Tabiun generation who resided in Medina. He was a student of Ibn Umar.

The Risāla by al-Shafi'i (d. 820), full title Kitab ar-Risāla fī Uṣūl al-Fiqh (Arabic: كتاب الرسالة في أصول الفقه, "The Book of the Treatise on the Principles of Jurisprudence"), is a seminal text on the principles of Islamic jurisprudence.

The word risāla in Arabic means a "message" or "letter". Shafi'i's treatise received its name owing to a traditional, though unverified, story that Shafi'i composed the work in response to a request from a leading traditionist in Basra, ‘Abd al-Raḥmān bin Mahdī; the story goes that Ibn Mahdī wanted Shafi'i to explain the legal significance of the Quran and the sunna, and the Risāla was Shafi'i's response.

Hadith is the Arabic word for a 'report' or an 'account [of an event]' and refers to the Islamic oral tradition of anecdotes containing the purported words, actions, and the silent approvals of the Islamic prophet Muhammad or his immediate circle (companions in Sunni Islam, Ahl al-Bayt in Shiite Islam).

After being compiled in the 10th and 11th centuries, the Hadiths began to be imposed by socio-political and spiritual authorities as the original words of Muhammad from the 14th century onwards. For many Muslim sects, hadith was a reliable source for religious and moral guidance known as sunnah, which ranks second to that of the Quran in authority, widely respected in mainstream Islamic thought, so that the majority of Sharia rules derived from hadith rather than the Quran. However, in the early Islamic society the use of hadith as it is understood today (documentation, isnads, etc.) came gradually. Sunnah originally meant a tradition that did not contain the definition of good and bad. Later, "good traditions" began to be referred to as sunnah and the concept of "Muhammad's sunnah" was established. Muhammad's sunnah gave way to the "hadiths of Muhammad" which were being transmitted orally, then recorded in the corpuses that continued to be collected, classified and purified according to various criteria in the following centuries. Scholars have categorized hadith based on their reliability, sorting them into classifications such as sahih ('authentic'), hasan ('good'), and da'if ('weak'). This classification is subjective to the person doing this study and differences in classification have led to variations in practices among the different Islamic schools and branches. The study of hadith is a central discipline in Islam, known as the hadith sciences, and is also examined in the contemporary historiographical field of hadith studies.