684. hadíth
16 وَ بِإِسْنَادِهِ عَنْ مُحَمَّدِ بْنِ الْفَضْلِ عَنْ أَبِي نَابٍ عَنْ أَبِي عَبْدِ اللَّهِ (ع) قَالَ سَأَلْتُهُ عَنْ زِيَارَةِ قَبْرِ الْحُسَيْنِ (ص) قَالَ نَعَمْ تَعْدِلُ عُمْرَةً وَ لَا يَنْبَغِي التَّخَلُّفُ عَنْهُ أَكْثَرَ مِنْ أَرْبَعِ سِنِينَ
16. ‘Amraki (ibn ‘Ali) narrated through his Isnād from Muḥammad ibn Faďl, from Abī Nāb, who said: I asked Abā ‘Abdillāh (Imam Sādiq (a.s.)) about (the reward for) going to the Ziyārah of the grave of Ḥusain (a.s.). Imam (a.s.) said, “Yes. It is equal to performing an ‘Umrah and one should not refrain from (going to) him for longer than four years.”