Most sources place Jafar al-Sadiq’s birth in Medina in 83 AH / 702 CE.

Sources: [5] Biographical chronology, [8] 83 AH among principal birth dates, [13] Most sources give 83 AH

Alternative birth years of 80 AH / 699 CE and 86 AH / 705 CE are also transmitted.

Sources: [3] Classical chronology, [8] 80 and 83 AH variants, [13] 80, 83 and 86 AH variants

Jafar’s mother Umm Farwa was a daughter of al-Qasim ibn Muhammad ibn Abi Bakr, giving him a maternal genealogical connection to Abu Bakr.

Sources: [3] Family genealogy, [8] Umm Farwa and al-Qasim genealogy, [13] Maternal descent from Abu Bakr

Sunni hadith-biographical sources generally regard Jafar al-Sadiq as a trustworthy and truthful transmitter.

Sources: [2] Classical biographical evaluation, [5] Hadith-critical evaluation, [8] Thiqah and respected jurist/transmitter

Malik ibn Anas transmitted hadith from Jafar al-Sadiq.

Sources: [5] Transmission network, [8] Malik among transmitters from Jafar, [12] Malik relates hadith from Jafar

A scholarly relationship between Jafar al-Sadiq and Abu Hanifa is widely reported, but its precise form is disputed and later narratives are heavily shaped by Sunni-Shiʿi polemics.

Sources: [8] Debates and scholarly association, [12] Imami debate narratives are explicitly identified as polemical, [13] Recorded as teaching with or studying under Jafar

Shiʿi biographical literature reports that Jafar had or was transmitted from by roughly four thousand students, a figure that should remain reported rather than treated as a verified census.

Sources: [2] Classical scholarly network, [8] Shiʿi sources report four thousand transmitters/students, [13] Large circle of followers

Jafar generally avoided armed revolt during the late Umayyad and early Abbasid periods and focused primarily on scholarship and religious authority.

Sources: [7] Political context, [8] Withdrawal from armed politics, [13] Scholarly imamate and avoidance of revolt

Jafar opposed the revolt of Muhammad al-Nafs al-Zakiyya and Ibrahim in 145 AH / 762 CE and is reported to have warned that it would fail.

Sources: [7] Historical revolt context, [8] Opposed the 145 AH revolt, [13] Political non-insurrectionary posture

Twelver Shiism recognizes Jafar al-Sadiq as the sixth Imam.

Sources: [8] Sixth Twelver Imam, [12] Imami doctrinal authority, [13] Sixth Imam of Imami Shiites

Ismaili tradition recognizes Jafar al-Sadiq in its line of imams, commonly as the fifth after Ali.

Sources: [8] Fifth Ismaili Imam, [12] Ismaili legal reception, [13] Common pre-split imamate and succession history

The legal corpus transmitted under Jafar’s authority became foundational for Imami jurisprudence, which came to be known as the Jafari legal tradition.

Sources: [8] Jafari fiqh and legal authority, [12] Major source of Imami jurisprudence, [13] Imami law called al-madhhab al-Jafari

Imami collections attribute to Jafar a strong rejection of qiyas, often through debate narratives involving Abu Hanifa; the historicity of individual polemical scenes varies.

Sources: [8] Rejection of qiyas attributed in debate literature, [12] Imami corpus strongly rejects qiyas, [13] Abu Hanifa polemical relationship

Sources attributed to Jafar preserve mutually conflicting theological and legal positions, showing that later schools frequently appropriated his authority.

Sources: [2] Later biographical reception, [8] Differing Sunni and Shiʿi portraits, [12] Contradictory positions attributed by rival schools

Jafar became a major authority in later Sufi literature and initiatic memory, although some claimed direct discipleships and chains are historically problematic.

Sources: [4] Classical devotional reception, [8] Prominent in later Sufi chains and literature, [11] Major place in later Sufi tradition

The claim that Jafar al-Sadiq was the alchemical master of Jabir ibn Hayyan is historically disputed, with modern scholarship divided over the relationship and the dating of the Jabirian corpus.

Sources: [8] Alchemy/Jabir claims described as highly doubtful or exaggerated, [10] Historical relation with Jabir remains very controversial, [13] Later works and esoteric attribution context

Many works are attributed to Jafar in tafsir, theology, esotericism, medicine and alchemy, but no extant work can be securely identified as an autograph composition written by him.

Sources: [8] Most attributed works considered doubtful, [10] Numerous apocryphal esoteric works, [13] No attributed work securely described as authored by Jafar

The dominant historical account holds that Jafar’s eldest son Ismail predeceased him, though later succession traditions interpreted Ismail’s status differently.

Sources: [2] Family succession biography, [8] Ismail died before Jafar, [13] Dominant account: Ismail predeceased Jafar

Jafar al-Sadiq died in Medina in 148 AH / 765 CE, a date accepted by nearly all major biographical traditions.

Sources: [5] Hadith-biographical chronology, [8] Death in 148 AH / 765 CE, [13] Nearly universal 148 AH date

Shiʿi tradition commonly attributes Jafar’s death to poisoning ordered by the Abbasid caliph al-Mansur, but the poisoning is not securely established by early historical evidence.

Sources: [3] Early biographical record does not securely establish poisoning, [8] Shiʿi poisoning narrative, [13] Supposed poisoning by al-Mansur, political purpose unclear