This text analyzes systematically the events recorded in the history books and proves without doubt that ‘Abdullah Bin Saba΄, the alleged founder of the Shi‘ah sect in Islam was a fictitious character. Further, the author throws some light on the narrations and the researchers who relied on such forgery in their historical and ideological research. The opinions of the great scholars of Islam about the inauthenticity and the unreliability of Sayf ibn ‘Umar are also given.