3. My father and ‘Ali ibn Ḥusain both narrated to me from Sa’d ibn ‘Abdillāh, from Aḥmad ibn Muḥammad, from Muḥammad ibn Sinān, from Ismā’īl ibn Jābir, who said: I heard Abā ‘Abdillāh (Imam Sādiq ) say: I swear to Allāh that the descendants of the killers of Ḥusain will be killed for the acts of their fathers.