The Sufficient (Vol 4) · Hadith 2169 (#Ḥadīth #2)
Chapter 234 | The Excellence and Virtue of Visiting Abu Al-Hassan, Musa, ‘Alayhi al-Salam
2ـ مُحَمَّدُ بْنُ يَحْيَى عَنْ أَحْمَدَ بْنِ مُحَمَّدٍ عَنِ الْحَسَنِ بْنِ عَلِيٍّ الْوَشَّاءِ عَنِ الرِّضَا (عَلَيْهِ السَّلاَم) قَالَ سَأَلْتُهُ عَنْ زِيَارَةِ قَبْرِ أَبِي الْحَسَنِ (عَلَيْهِ السَّلاَم) مِثْلُ قَبْرِ الْحُسَيْنِ (عَلَيْهِ السَّلاَم) قَالَ نَعَمْ.
2. Muhammad ibn Yahya has narrated from Ahmad ibn Muhammad from al-Hassan ibn Ali al-Washsha’ who has said the following: “I once asked al-Rida’ , ‘Is visiting the grave of abu al-Hassan , like visiting the grave of al-Husayn ?’ He (the Imam) replied, ‘Yes, it is so.’”
Gradings are classical jarḥ-wa-taʿdīl, name-matched to a rijāl index (not individually re-verified).