Companions of the Prophet in the context of "Saqifah"

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.

Abd Allah ibn Abi Quhafa (Arabic: عَبْدُ اللهِ بْنُ أَبِي قُحَافَةَ, romanized: ʿAbd Allāh ibn ʾAbī Quḥāfa) (c. 573 – 23 August 634), better known by his kunya Abu Bakr, was a senior companion, the closest friend, and father-in-law of Muhammad, the Islamic prophet. He served as the first caliph of the Rashidun Caliphate, ruling from 632 until his death in 634. Abu Bakr was granted the honorific title al-Ṣiddīq (lit. the Veracious) by Muhammad, a designation that continues to be used by Sunni Muslims to this day.

Born to Abu Quhafa and Umm al-Khayr of the Banu Taym, Abu Bakr was among the earliest converts to Islam and propagated dawah to the Mushrikites. He was considered the first Muslim missionary, as several companions of Muhammad converted through Abu Bakr. He accompanied Muhammad on his migration to Medina and became one of his bodyguards. Abu Bakr participated in all of Muhammad's campaigns and served as the first amir al-hajj in 631. In the absence of Muhammad, Abu Bakr led the prayers.

The Saqifa (Arabic: سَقِيفَة, romanized: Saqīfah) of the Banu Sa'ida clan refers to the location of an event in early Islam where some of the companions of the Islamic prophet Muhammad pledged their allegiance to Abu Bakr as the first caliph and successor to Muhammad shortly after his death in 11 AH (632 CE). The Saqifa meeting is among the most controversial events in early Islam, due to the exclusion of a large number of Muhammad's companions, including his immediate family and notably Ali, his cousin and son-in-law. The conflicts that arose soon after Muhammad's death are considered to be the main cause of the current division among Muslims. Those who accepted Abu Bakr's caliphate were later labeled Sunnis, while the supporters of Ali's right to caliphate were later labeled Shia.

Shia Islam is the second-largest branch of Islam. It holds that Muhammad designated Ali ibn Abi Talib (r. 656–661) as both his political successor (caliph) and as the spiritual leader of the Muslim community (imam). However, his right is understood to have been usurped by a number of Muhammad's companions at the meeting of Saqifa, during which they appointed Abu Bakr (r. 632–634) as caliph instead. As such, Sunni Muslims believe Abu Bakr, Umar (r. 634–644), Uthman (r. 644–656) and Ali to be 'rightly-guided caliphs', whereas Shia Muslims regard only Ali as the legitimate successor.

Shia Muslims believe that the imamate continued through Ali's sons, Hasan and Husayn, after which various Shia branches developed and recognized different imams. They revere the ahl al-bayt, the family of Muhammad, maintaining that they possess divine knowledge. Shia holy sites include the shrine of Ali in Najaf, the shrine of Husayn in Karbala, and other mausoleums of the ahl al-bayt. Later events, such as Husayn's martyrdom in the Battle of Karbala (680 CE), further influenced the development of Shia Islam, contributing to the formation of a distinct religious sect with its own rituals and shared collective memory.

Umar ibn al-Khattab (Arabic: عُمَر بْن ٱلْخَطَّاب, romanized: ʿUmar ibn al-Khaṭṭāb; c. 584 – 644), also spelled Omar, was the second Rashidun caliph, ruling from August 634 until his assassination in 644. He succeeded Abu Bakr (r. 632–634) and is regarded as a senior companion and father-in-law of the Islamic prophet Muhammad.

Initially, Umar opposed Muhammad, who was his distant Qurayshite kinsman. However, after converting to Islam in 616, he became the first Muslim to openly pray at the Kaaba. He participated in nearly all of Muhammad’s battles and expeditions, and Muhammad conferred upon him the title al-Fārūq ("the Distinguisher") for his sound judgement. After Muhammad’s death in June 632, Umar pledged allegiance to Abu Bakr as the first caliph and served as his chief adviser. In 634, shortly before his death, Abu Bakr nominated Umar as his successor.

Uthman ibn Affan (Arabic: عُثْمَان بْن عَفَّان, romanized: ʿUthmān ibn ʿAffān) (c. 573 or 576 – 17 June 656) was the third caliph of the Rashidun Caliphate, ruling from 644 until his assassination in 656. Uthman, a second cousin, son-in-law, and senior companion of the Islamic prophet Muhammad, played a major role in early Islamic history. During his reign as caliph, he was known for ordering the official compilation of the standardized version of the Quran, known as Uthman's Quran, that is still being used today.

Before his predecessor, caliph Umar (r. 634–644) died in office, he appointed a committee of trustees to elect a successor. Uthman, who was then aged 68–71 years, was elected to succeed him and became the oldest person to hold such a high position. During his premiership, the Caliphate expanded further into Persia and reached as far as the provinces of Khorasan and Transoxiana in the East as well as Ifriqiya and the Iberian Peninsula in the West. Uthman instituted centralized reforms in order to create a more cohesive administrative structure and fostered rapid economic growth.

Marwan ibn al-Hakam ibn Abi al-As ibn Umayya (Arabic: مروان بن الحكم بن أبي العاص بن أمية, romanized: Marwān ibn al-Ḥakam ibn Abī al-ʿĀṣ ibn Umayya; 623 or 626 – April/May 685), commonly known as Marwan I, was the fourth Umayyad caliph, ruling for less than a year in 684–685. He founded the Marwanid ruling house of the Umayyad dynasty, which replaced the Sufyanid house after its collapse in the Second Fitna and remained in power until 750.

During the reign of his cousin, the third Rashidun caliph Uthman (r. 644–656), Marwan took part in a military campaign against the Byzantine Exarchate of Africa (in central North Africa), where he acquired significant war spoils. He also served as Uthman's governor in Fars (southwestern Iran) before becoming the caliph's katib (secretary or scribe). He was wounded fighting the rebel siege of Uthman's house, in which the caliph was slain. In the ensuing civil war between the fourth Rashidun caliph Ali (r. 656–661) and the largely Qurayshite partisans of Aisha, Marwan sided with the latter at the Battle of the Camel. Marwan later served as governor of Medina under his distant kinsman Caliph Mu'awiya I (r. 661–680), founder of the Umayyad Caliphate. During the reign of Mu'awiya's son and successor Yazid I (r. 680–683), Marwan organized the defense of the Umayyad realm in the Hejaz (western Arabia) against the local opposition which included prominent companions as well as Muhammad’s own clan, the Bani Hashim, who revolted under the banner of Muhammad’s grandson, Husayn ibn Ali. After Yazid died in November 683, the Mecca-based rebel and sahabi Abd Allah ibn al-Zubayr declared himself caliph and expelled Marwan, who took refuge in Syria, the center of Umayyad rule. With the death of the last Sufyanid caliph Mu'awiya II in 684, Marwan, encouraged by the ex-governor of Iraq Ubayd Allah ibn Ziyad, volunteered his candidacy for the caliphate during a summit of pro-Umayyad tribes in Jabiya. The tribal nobility, led by Ibn Bahdal of the Banu Kalb, elected Marwan and together they defeated the pro-Zubayrid Qays tribes at the Battle of Marj Rahit in August of that year.

Amr ibn al-As ibn Wa'il al-Sahmi (c. 585 – 664) was an Arab commander and companion of Muhammad who led the Muslim conquest of Egypt and served as its governor in 640–646 and 658–664. The son of a wealthy Qurayshite, Amr embraced Islam in c. 629 and was assigned important roles in the nascent Muslim community by the Islamic prophet Muhammad. The first caliph Abu Bakr (r. 632–634) appointed Amr as a commander of what became the conquest of Syria. He conquered most of Palestine, to which he was appointed governor, and helped lead the Arabs to decisive victories over the Byzantines at the battles of Ajnadayn and the Yarmuk in 634 and 636.

Amr launched the expedition that conquered Egypt on his own initiative in late 639, defeating the Byzantines in a string of victories ending with the surrender of Alexandria in 641 or 642. It was the swiftest of the early Muslim conquests. This was followed by westward advances by Amr as far as Tripoli in present-day Libya. In a treaty signed with the Byzantine governor Cyrus, Amr guaranteed the security of Egypt's population and imposed a poll tax on non-Muslim adult men. He maintained the Coptic-dominated bureaucracy and cordial ties with the Coptic patriarch Benjamin. He founded Fustat as the provincial capital with the mosque later called after him at its center. Amr ruled relatively independently, acquired significant wealth, and upheld the interests of the Arab conquerors who formed Fustat's garrison in relation to the central authorities in Medina. After gradually diluting Amr's authority, Caliph Uthman (r. 644–656) dismissed him in 646 after accusations of incompetence from his successor Abd Allah ibn Sa'd.

The migration to Abyssinia (Arabic: الهجرة إلى الحبشة, romanized: al-hijra ʾilā al-habaša), also known as the First Hijra (الهجرة الأولى, al-hijrat al'uwlaa), was an episode in the early history of Islam, where the first followers of the Islamic prophet Muhammad (they were known as the Sahabah, or the companions) migrated from Arabia due to their persecution by the Quraysh, the ruling Arab tribal confederation of Mecca. They sought and were granted refuge in the Kingdom of Aksum, an ancient Christian state that was situated in modern-day northern Ethiopia and Eritrea (also referred to as Abyssinia), in 9 BH (613 CE) or 7 BH (615 CE). The kingdom's capital was Aksum, which is an ancient city in the Tigray Region of Ethiopia. The ruling Aksumite monarch who received them is known in Islamic sources as Najashi (نجاشي, najāšī), the Negus of the kingdom; modern historians have alternatively identified him with the Aksumite king Armah and Ella Tsaham. Some of the Sahabah exiles returned to Mecca and made the migration to Medina with Muhammad, while the others remained in Aksum and arrived in Medina in 628.

The migration to Abyssinia is an Islamic historical event that refers to the migration of some of the early Muslims from Mecca to Abyssinia (the Kingdom of Aksum) because of the harm they were facing from the leaders of Quraysh. A number of Muslims left, and the first migration to Abyssinia was in Rajab of the fifth year after the mission. They were eleven men and four women, and they appointed Uthman ibn Mazun as their leader. Then, while they were in Abyssinia, they heard that the people of Mecca had converted to Islam. Some of them returned to Mecca, but they did not find that to be true. So they returned, and another group went with them to Abyssinia. It was the second migration. They were eighty-three men, their wives, and their children, headed by Ja`far ibn Abi Talib.

Al-Abbas ibn Abd al-Muttalib (c. 566–653 CE) was a paternal uncle and sahabi (companion) of the Islamic prophet Muhammad, just three years older than his nephew. A wealthy merchant, during the early years of Islam he protected Muhammad while he was in Mecca, but only became a convert after the Battle of Badr in 624 CE (2 AH). His descendants founded the Abbasid dynasty in 750.

The Zahiri school or Zahirism is a school of Islamic thought within Sunni Islam. It was named after Dawud al-Zahiri and flourished in Spain during the Caliphate of Córdoba under the leadership of Ibn Hazm. It was also followed by the majority of Muslims in Mesopotamia, Portugal, the Balearic Islands, and North Africa. The Zahiri school lost its presence around the 14th-century. The school is considered to be endangered, but it continues to exert influence over legal thought. Today it is followed by minority communities in Morocco and Pakistan.

The Zahiri school is characterized by strict adherence to literalism and reliance on the outward (ẓāhir) meaning of expressions in the Quran and a limited amount of ḥadīth literature; the consensus (ijmāʿ) of the first generation of Muhammad's closest companions (ṣaḥāba) excluding the scholars, for sources of Islamic law (sharīʿa); and rejection of analogical deduction (qiyās) and societal custom or knowledge (urf), used by other schools of Islamic jurisprudence.

The Salafi movement or Salafism (Arabic: السلفية, romanized: as-Salafiyya) is a fundamentalist revival movement within Sunni Islam, originating in the late 19th century and influential in the Islamic world to this day. The name "Salafiyyah" is a self-designation, claiming a return to the traditions of the predecessors (salaf), the first three generations of Muslims (the Islamic prophet Muhammad and the Sahabah [his companions], then the Tabi'in, and the third generation, the Tabi' al-Tabi'in), who are believed to exemplify the pure form of Islam. In practice, Salafis claim that they rely on the Qur'an, the Sunnah and the Ijma (consensus) of the salaf, giving these writings precedence over what they claim as "later religious interpretations". The Salafi movement aimed to achieve a renewal of Muslim life, and had a major influence on many Muslim thinkers and movements across the Islamic world.

Salafi Muslims oppose bid'ah (religious innovation) and support the implementation of sharia (Islamic law). In its approach to politics, the Salafi movement is sometimes divided by Western academics and journalists into three categories: the largest group being the purists (or quietists), who avoid politics; the second largest group being the activists (or Islamists), who maintain regular involvement in politics; and the third group being the jihadists, who form a minority and advocate armed struggle to restore early Islamic practice. In legal matters, Salafis advocate ijtihad (independent reasoning) and oppose taqlid (blind faith) to the four schools (madhahib) of Islamic jurisprudence.