13. Muḥammad ibn Ya’qūb narrated to me from Aḥmad ibn Idrīs, from Muḥammad ibn ‘Abdil Jabbār, from Safwān, from Ibn Muskān, who said: Abū ‘Abdillāh (Imam Sādiq ) said: Those who go to (the Ziyārah of) the grave of Ḥusain knowing his rights will be forgiven for all of their past and future sins.