Al-Kāfi - Volume 4 > The Virtue and Excellence of Visiting abu ‘Abd Allah, al-Husayn, ‘Alayhi al-Salam
Hadith #2

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, ‘Alayhi al-Salam, has said that visiting the gravesite of al-Husayn, ‘Alayhi al- Salam, is equal in rewards to twenty Hajjah. It is even more virtuous than ‘Umrah and Hajjah.”