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Shiavault - a Vault of Shia Islamic Books Abdullah Ibn Saba’ and Other Myths Investigation concerning Saif and his Narrations Who is Saif? According to Tabari, vol.l, p.1749, (Europe) and Lobabul Ansab, vol.1, p.49, Saif's full name was Saif Bin ‘Omar al-Tamimi al-Osayyadi. According to Jamharatul Ansab, p.199 and Ibn Doraid's book, al-Ishtiqaq, pp.201-206, Osayyad's name was ‘Amr Bin Tamimi.
Because Saif was a descendent of ‘Amr he has contributed much more about Bani Amr's heroic deeds than others. It is written "Osady" in Ibn Nadim's book, Fihrest, instead of Osayyad. It is recorded in Tahzibul Tahzib, al-borjomi wal Sa‘dy or al-Zaby (ﻲﺒّﻀﻟا وا يﺪﻌﱠﺴﻟاو ﻲﻤُﺟﺮُﺒﻟا).
If this were true it only reveals that the Borjom tribe and Osayyed had some agreement (peace treaty etc.) between themselves since Borjom and Osayyed were not close relatives even if we believe that both tribes were descendents of Bani Tamim. It is recorded in Tahzibul Tahzib, Kholas atul Tahzib and Hidayatul ‘Arefin that Saif came from Kufa and resided in Baghdad. According to Kholasatul Tahzib, Saif died in the year 170 H.L.
It is written in al-Tahzib, "I have seen Dhahabi's hand writing saying that Saif died during the rule of Haroon al-Rashid." Ismail Pasha in his book al-Hidaya, says, "He (Saif) died in Baghdad during the rule of Haroon al-Rashid in the year 200 and al-Rashid died in the year 193." No one else has said so, neither has Ismail Pasha revealed the source of his information. Saif's Books According to al-Fihrest and al-Hidaya, Saif wrote two books:- al-Fotooh al-Kabir wal Reddah.
al-Jamal wa Masire ‘Aesha wa ‘Ali. And according to al-Lobab, Tahzib and Kashful- Zonoon, Saif wrote only the book al-Fotooh. Tabari in his book has recorded from Saif's two books, al-Fotooh and al-Jamal in the order of the names of people playing parts in the events but he has not made reference to Saif's books.
Dhahabi in his history of al-Kabir; and Ibn ‘Asaker in al-Tamhid have recorded from Saif according to the names of people playing parts in the event and they have made references to Saif's books. The most famous historians who have written about the companions of the Prophet are Ibn Abdul Birr, Ibn Athir, Ibn Hajar and Dhahabi. These historians have recorded the names of the heroes invented by Saif along with the names of the real Sahabis ( of the Prophet).
Geographians such as al-Hamawi, in his Mo‘jam; and al-Hemiari in al-Rouz have named non-existent places invented by Saif.