5. My father narrated to me from Sa’d ibn ‘Abdillāh, from Ya’qūb ibn Yazīd, from Ibn Abī ‘Umayr, from some of our companions, from Ibn Abī Nāb, who said
Abū ‘Abdillāh (Imam Sādiq (a.s.)) said: It is an obligation on those who are poor to go to (the Ziyārah of) the grave of Ḥusain (a.s.) once a year and on those who are wealthy to go twice a year.