My father narrated to us. He said: `Ali b. Musa b. Ja`far b. Abi Ja`far al-Kamandani narrated to us from Ahmad b. Muhammad b. `Isa from Muhammad b. Abi `Umayr from al-Husayn b. Mus`ib al-Hamadani. He said: I heard al-Sadiq Ja`far b. Muhammad say:

Fulfill trusts, even to a killer of al-Husayn b. `Ali .