October 28, AD 749

As-Saffah

Abu al-Abbas is acclaimed Abbasid caliph at Kufa

The new caliph began his inaugural address from the pulpit, could not continue, and his uncle finished the speech for him.

A choice made at swordpoint in 749

Khurasani revolutionary leaders discovered the Abbasid family in hiding at Kufa in 749, armed themselves, went to its residence and swore allegiance to Abu al-Abbas Abd Allah ibn Muhammad — forcing the revolutionary administrator Abu Salama to accept their choice.

At a Friday gathering in Kufa's Great Mosque, Abu al-Abbas mounted the pulpit and presented the family's claim to rule through descent from al-Abbas, the Prophet Muhammad's paternal uncle.

He then became unable to continue — the accounts describe fever, illness or nervousness — and his uncle Dawud ibn Ali completed the address.

No day survives

The listed 28 October is not securely supported, and it fell on a Tuesday, whereas the narrative traditions place the mosque proclamation on a Friday.

Published reconstructions vary sharply: 3 Rabi I / 20 October, 13 Rabi I / 30 October, about 14 Rabi I / 31 October, and 12 Rabi II / 28 November.

October 749 is the safest month-level date; the variations may reflect different source traditions, manuscript readings, or the separation of an initial oath from a later public ceremony.

Two caliphs at once

The new caliph promised better times, and allegiance was received from the assembled Kufans and Khurasani soldiers. Surviving versions of the speech associate him with the title al-Saffah.

That title is contested. It can evoke pouring out blood, but scholars have also argued for the generous one — one who pours out gifts.

The ceremony did not end Umayyad rule: Marwan II remained caliph with substantial territory and armies, and the decisive battle at the Zab had not yet been fought.

Sources

Researched 23 Aug 2026 6 sources not yet audited Date disputed

How this was checked

Researched from the web into a fact sheet and rewritten from that sheet. This article has not yet had an independent model audit. How the pipeline works →

Date disputed. Sources disagree; the research places it at ~0749-10.

What the sources leave uncertain

The listed date, 28 October 749, is not securely supported and fell on a Tuesday, whereas the narrative traditions place the mosque proclamation on a Friday.
Published reconstructions vary sharply: 3 Rabi I/20 October, 13 Rabi I/30 October, about 14 Rabi I/31 October, and 12 Rabi II/28 November 749.
The variations may reflect different source traditions, manuscript readings, or the separation of an initial oath from a later public ceremony. October 749 is the safest month-level date, but no exact day is solid.
The meaning of al-Saffah is debated. It can evoke pouring out blood, but scholars have also argued for “the generous one,” meaning one who pours out gifts. “Slaughterer of Blood” should not be treated as an uncontested translation.