Khalifa ibn Khayyat

Abu Amr Khalifa ibn Khayyat al-Usfuri^[a] (777–854) was an Arab Islamic scholar and historian. His family were natives of Basra in Iraq. His grandfather was a noted muhaddith or traditionalist, and Khalifa became renowned for this also. Among the great Islamic scholars who were his pupils were al-Bukhari and Ibn Hanbal.

He wrote at least four works, of which two have survived, these being the Tabaqat (biographies) and Tarikh (history).^{[citation needed]} The latter is valuable as being one of three of the earliest Arabic histories, but the full text was not known until an 11th-century copy was found in 1966, in the Nassiriyya Zawiya in Tamegroute, where the local dry climate helped preserving it, and was published in 1967 after being scrutinized by Syrian historian Souhail Zakkar.^{[citation needed]}

• J. Schacht (1969), "The Kitāb al-Tārīḫ of Khalifa bin Hayyat", Arabica, 16, 79–81. Schacht found the manuscript, and in the article reviews its publication by one of his former students.