Four things are vain to do

4-142 (The compiler of the book narrated) that his father - may God be pleased with him - narrated that Ali ibn Musa ibn Ja’far ibn Abi Ja’far al-Kumaydany quoted Ahmad ibn Muhammad ibn Isa, on the authority of Ali ibn al-Hikam who linked it up through a chain of narrators to Aba Abdullah as-Sadiq (MGB)

4-144 Muhammad ibn al-Hassan ibn Ahmad ibn al-Walid - may God be pleased with him - narrated that Muhammad ibn al-Hassan al-Saffar quoted Muhammad ibn Isa ibn Ubayd, on the authority of Ubaydullah ibn Abdullah al-Dihqan, on the authority of Durost ibn Abi Mansoor al-Vaseti, on the authority of Aba Abdullah as-Sadiq (MGB)