The Shia İmamiyyah theory and the hujjah section of Kulayni's al-Kafis mutual and ammah narrators

This study will firstly take into account a brief introduction on the Immamiyyah Shi'a which will then be followed by the immamiyyah theory being one of its essential teachings. Thereupon reference to the verses and hadiths used to evident this theory will be elaborated in order to grasp an understanding of its commentary methodology. In this regard Kulayni's extensive study al-Kafi is an important example whereby it gives one the opportunity to see those narrations collectively. For this reason, we will take into account al-Kafi's 'Kitabu'l-hujjah', including the collective and ammah narrator's biographies. Keywords: Sect, Shi'a, Imammiyah, Narrator, Collective, Ammah.