The consensus companions or "As'hab al-Ijma'" (Arabic: اصحاب الاجماع) are eighteen Muhaddith and Islamic scholars who had direct contact with Shia Imams and had great knowledge of religion.[1]Shia scholars accept unquestioningly every hadith which was narrated by them.[2]
Sachedina, Abdulaziz (1998). The Just Ruler in Shi'ite Islam: The Comprehensive Authority of the Jurist in Imamite Jurisprudence. Oxford University Press US. ISBN0195119150.
Walbridge, Linda S. (2001). The Most Learned of the Shiʻa: The Institution of the Marjaʻ Taqlid. Oxford University Press US. ISBN019513799X.