٤ـ مُحَمَّدُ بْنُ الْحُسَيْنِ عَنْ مُحَمَّدِ بْنِ إِسْمَاعِيلَ عَنْ صَالِحِ بْنِ عُقْبَةَ عَنْ أَبِي سَعِيدٍ الْمَدَائِنِيِّ قَالَ دَخَلْتُ عَلَى أَبِي عَبْدِ الله (عَلَيْهِ السَّلاَم) فَقُلْتُ لَهُ جُعِلْتُ فِدَاكَ أَئْتِ [آتِي‏] قَبْرَ الْحُسَيْنِ (عَلَيْهِ السَّلاَم) قَالَ نَعَمْ يَا أَبَا سَعِيدٍ فَائْتِ قَبْرَ ابْنِ رَسُولِ الله (صلَّى اللهُ عَلَيْهِ وَآلِه) أَطْيَبِ الطَّيِّبِينَ وَأَطْهَرِ الطَّاهِرِينَ وَأَبَرِّ الأَبْرَارِ فَإِذَا زُرْتَهُ كَتَبَ الله لَكَ بِهِ خَمْسَةً وَعِشْرِينَ حَجَّةً.
4. Muhammad ibn al-Husayn has narrated from Muhammad ibn Isma‘il from Salih ibn ‘Uqbah from abu Sa‘id al-Mada’iniy who has said the following: “I once visited abu ‘Abd Allah , and said to him, ‘I pray to Allah to keep my soul in service for your cause, can I visit the grave of al-Husayn  ?’ He (the Imam) said, ‘Yes, O abu Sa‘id, you should visit the grave of the grandson of the Messenger of Allah, O Allah, grant compensation to Muhammad and his family worthy of their services to Your cause. He is the most likeable of all likeable ones, the cleanest of all clean ones, the most virtuous of all virtuous ones. When you visit him Allah writes for you the reward for twenty- five times performing al-Hajj.’” 