According to some quotations, especially what has been narrated by Tabarī, some people have claimed that ‘Umar was murdered with the plot of Ka‘b al-Ahbār. This news has been raised in different forms and it seems that anyone has changed it in a particular way. Historians and narrators of Sunnites hadiths brought this news in their books for centuries, but they believed so much in the predictions and reports of Ka‘b and people like him that they did not have the least suspicion about Ka‘b’s role in the caliph’s murder. Djāhi¨ who is a rationalist critic, has this opinion about what Ka‘b has narrated from the Torah (although there is no such thing in the Torah), I believe that many of these reports which have been quoted with phrases such as “We find them in the books” or “written in the Torah”,...