Historical Explanation of Reasons concerning not Presentation of Qadir Event in Sireh Ibn e- Eshaaq

Qadier event being considered as one of the most important narrative documents in relation to proving the succession of Amir al- Momenin Ali (PBUH) has been frequently reported in Sunnite sources and it is accepted by many of their scholars. However, it is observed some ambiguities related to the truth of this narration in some sources. One of them is ignoring this narration by one of the important pioneer biographers of Prophet and Imam, Mohammad Ibn e- Eshaqq. In this research, it is explained about the reason of not narrating this event in Sireh Ibn e- Eshaaq through the presentation of some evidences from the political and cultural conditions dominant in time of writing this biography and via the historical clarifications to investigate the lodgment of Ibn e- Eshaaq on the report related to Qadir event and the strong beliefs of some Shiite scholars in the narration of this event by him.