The principal biographical tradition places Sufyan al-Thawri’s birth in 97 AH / 715–716 CE.

Sources: [4] Hadith-biographical chronology, [6] 97 AH principal date, [9] Standard chronology

Alternative birth years of 95, 96 and 98 AH are also transmitted.

Sources: [2] Classical biography, [6] 95, 96 and 98 AH variants, [9] Variant chronology

Biographical sources include Jafar al-Sadiq among Sufyan al-Thawri’s teachers.

Sources: [1] Classical biography, [6] Jafar listed among teachers, [9] Scholarly network

Sufyan al-Thawri was one of the leading hadith authorities of the second Islamic century and was treated as exceptionally reliable by major critics.

Sources: [4] Hadith-critical evaluation, [5] Hadith-biographical authority, [6] Major hadith imam

Sufyan participated in early narrator evaluation and the resolution of conflicting reports, contributing to the formative development of jarh wa-tadil.

Sources: [1] Classical hadith reputation, [4] Rijal evaluation, [6] Early narrator criticism

Classical sources preserve criticism that Sufyan occasionally practiced tadlis, while major hadith critics continued to regard him as a highly reliable authority.

Sources: [1] Strong reliability despite criticism, [4] Technical hadith evaluation, [6] Criticism and classical defense

A later report claiming more than twenty thousand students was explicitly regarded as exaggerated by al-Dhahabi, who suggested a much smaller figure.

Sources: [1] Lower estimate in classical biography, [6] Al-Dhahabi rejects 20,000 as exaggerated, [9] Large student network

Sufyan al-Thawri was an independent jurist whose legal opinions were widely transmitted.

Sources: [6] Independent jurist, [7] Eponymous jurist and school, [9] Early legal authority

A distinct legal school identified with Sufyan al-Thawri developed through his students and transmitters.

Sources: [6] Distinct Thawri school, [7] Nascent madhhab identity, [9] Eponymous legal tradition

The Thawri school survived for several centuries in parts of Iraq, Syria, Iran and Khurasan before disappearing as an institutional madhhab.

Sources: [6] Regional survival across centuries, [7] Formation of eponymous madhhab, [9] Later school history

The tafsir transmitted under Sufyan’s name is an important early witness to report-based Qurʾanic exegesis, though the surviving recension is later and incomplete.

Sources: [1] Attributed works, [6] Early transmitted tafsir and incomplete recension, [9] Exegetical activity

Kitab al-Faraid attributed to Sufyan is among the oldest surviving witnesses to formative Islamic inheritance law.

Sources: [1] Attributed legal corpus, [6] Very early inheritance-law witness, [9] Legal works

The attribution to Sufyan of an alchemical treatise is historically doubtful and is not securely supported by the main biographical tradition.

Sources: [6] Main traditions do not corroborate alchemy claim, [7] Source-critical caution on later biography, [9] Later scientific attribution

Sufyan refused judicial office under the Abbasids and subsequently lived for long periods away from official authority.

Sources: [6] Refusal of judicial office, [7] Abbasid-office narratives, [9] Conflict with Abbasid authority

The exact date, place and circumstances of the Abbasid judicial appointment offered to Sufyan are transmitted inconsistently.

Sources: [6] Conflicting chronology and circumstances, [7] Biographical narratives vary and compete, [9] Judgeship narrative

Sources disagree about the precise nature of Sufyan’s political opposition; later competitive biographies sometimes amplified contrasts between him and al-Awzai.

Sources: [6] Contradictory reports on political stance, [7] Competitive hagiography amplified political contrast, [9] Political profile

Some reports portray Sufyan as viewing the revolt of Muhammad al-Nafs al-Zakiyya and Ibrahim sympathetically or as legitimate without openly joining it.

Sources: [6] Sympathy/legitimacy without open support, [7] Political memory, [9] Abbasid-period opposition

Sufyan was widely renowned in his own lifetime and later tradition for asceticism, piety and independence from rulers.

Sources: [1] Piety and independence, [3] Classical ascetic biography, [8] Early ascetic reputation

Later Sufi literature made Sufyan an important early spiritual authority, while this reception should be distinguished from later institutional Sufism.

Sources: [1] Classical reception, [3] Ascetic-spiritual memory, [8] Later Sufi reception

Sufyan al-Thawri died in Basra in 161 AH / 778 CE.

Sources: [4] Hadith-biographical chronology, [6] 161 AH / 778 CE, [9] Death chronology