3-193 (The compiler of the book narrated) that his father - may God be pleased with him - narrated that Sa’ed ibn Abdullah quoted Muhammad ibn Isa ibn Ubayd, on the authority of Al-Hassan ibn Ali ibn Yaqtayn, on the authority of Amr ibn Ibrahim, on the authority of Khalaf ibn Himmad, on the authority of one of our companions called al-Hassan ibn Ali, on the authority of Abi As-Sadiq Abdullah as-Sadiq (MGB), “You should not stand to pray behind three people: an unfamiliar person; someone who ascribes certain boastful attributes to the Divine Leaders, even if he expresses the same beliefs as you do; and one who is corrupt even if he is not boastful about the Divine Leaders.”