The Sufficient (Vol 4) · Hadith 2158 (#Ḥadīth #2)
Chapter 233 | The Virtue and Excellence of Visiting abu ‘Abd Allah, al-Husayn, ‘Alayhi al-Salam
2ـ عِدَّةٌ مِنْ أَصْحَابِنَا عَنْ أَحْمَدَ بْنِ مُحَمَّدِ بْنِ عِيسَى عَنْ مُحَمَّدِ بْنِ سِنَانٍ عَنِ الْحُسَيْنِ بْنِ الْمُخْتَارِ عَنْ زَيْدٍ الشَّحَّامِ عَنْ أَبِي عَبْدِ الله (عَلَيْهِ السَّلاَم) قَالَ زِيَارَةُ قَبْرِ الْحُسَيْنِ (عَلَيْهِ السَّلاَم) تَعْدِلُ عِشْرِينَ حَجَّةً وَأَفْضَلُ وَمِنْ عِشْرِينَ عُمْرَةً وَحَجَّةً.
2. A number of our people have narrated from Ahmad ibn Muhammad ibn ‘Isa from Muhammad ibn Sinan from al-Husayn ibn al- Mukhtar from Zayd al-Shahham who has said the following: “Abu ‘Abd Allah , has said that visiting the gravesite of al-Husayn , is equal in rewards to twenty Hajjah. It is even more virtuous than ‘Umrah and Hajjah.”
Gradings are classical jarḥ-wa-taʿdīl, name-matched to a rijāl index (not individually re-verified).