Al-Kāfi - Volume 4 > The Virtue and Excellence of Visiting abu ‘Abd Allah, al-Husayn, ‘Alayhi al-Salam
Hadith #8

8ـ الْحُسَيْنُ بْنُ مُحَمَّدٍ عَنْ مُعَلَّى بْنِ مُحَمَّدٍ عَنْ أَبِي دَاوُدَ الْمُسْتَرِقِّ عَنْ بَعْضِ أَصْحَابِنَا عَنْ مُثَنًّى الْحَنَّاطِ عَنْ أَبِي الْحَسَنِ الأَوَّلِ (عَلَيْهِ السَّلاَم) قَالَ سَمِعْتُهُ يَقُولُ مَنْ أَتَى الْحُسَيْنَ عَارِفاً بِحَقِّهِ غَفَرَ الله لَهُ مَا تَقَدَّمَ مِنْ ذَنْبِهِ وَمَا تَأَخَّرَ.

8. Al-Husayn ibn Muhammad has narrated from Mu‘alla’ ibn Muhammad from abu Dawud al-Mustariq from certain individuals of our people from Muthanna al-Hannat who has said the following: “I once heard abu al-Hassan, the 1st, Alayhi al-Salam, say, ‘Whoever visits al-Husayn, Alayhi al- Salam, with proper understanding of his rights, Allah forgives his sins of the past and those that come later.’”