Shaykh Tusi in his book "Rejal Tusi" has considered "Zakaria ibn Idris Ash'ari Qomi" as one of the companions of Jaʿfar ibn Muḥammad aṣ-Ṣādiq,[6] Musa ibn Ja'far al-Kadhim[7] and Ali ibn Musa al-Ridha[8] (Shia Imams). "Zakaria ibn Idris Ash'ari Qomi" has narrated several hadiths from these Shia Imams. Also, a correspondence has been narrated from him with Musa ibn Ja'far al-Kadhim about an Islamic jurisprudential issue.[9]