10. A group of our companions narrated to me from Aḥmad ibn Idrīs, and from Muḥammad ibn Yaḥyā Al-‘Aťťār, from ‘Amraki ibn Al-Būfaki, from someone who narrated to him, from Muḥammad ibn Fuďayl, from Abī Rabāb, who said: I asked Abā ‘Abdillāh (Imam Sādiq ) about (the reward for) going to the Ziyārah of the grave of Ḥusain . Imam said, “It is equal to performing an ‘Umrah, and one is not permitted to stay away from it for longer than four years.”