Hadith 22517

حَدَّثَنَا هُشَيْمُ بْنُ بَشِيرٍ ، أَخْبَرَنَا مَنْصُورٌ يَعْنِي ابْنَ زَاذَانَ ، عَنْ قَتَادَةَ ، عَنْ عَبْدِ اللَّهِ بْنِ مَعْبَدٍ الزِّمَّانِيِّ ، عَنْ أَبِي قَتَادَةَ , أَنَّ رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ سُئِلَ عَنْ صَوْمِ يَوْمِ عَرَفَةَ , فَقَالَ : " كَفَّارَةُ سَنَتَيْنِ " وَسُئِلَ عَنْ صَوْمِ يَوْمِ عَاشُورَاءَ ، فَقَالَ " كَفَّارَةُ سَنَةٍ " .
It is narrated from Hazrat Abu Qatadah (may Allah be pleased with him) that a person asked the Holy Prophet (peace and blessings be upon him) about fasting on the Day of Arafah (9th of Dhul-Hijjah), so the Holy Prophet (peace and blessings be upon him) said: "It is an expiation for two years." Then someone asked about fasting on the Day of Ashura, so he said: "It is an expiation for one year."
Hadith Reference مسند احمد / مسند الأنصار رضي الله عنهم / 22517
Hadith Grading حکم دارالسلام: إسناده صحيح، م: 1162