Caution: Translations of Quran and Ḥadīth may lead to possible misapplications and misinterpretations. This site is intended for students of sacred knowledge that are proficient in comprehending classical Arabic and have a strong foundation in Islamic sciences. Also note that religious injunctions rely on several aspects beyond what one may glean through reading individual aḥādīth.
Qurʾān Bukhārī Muslim Nasāʾī Abū Dāwūd Tirmidhī Ibn Mājah Mālik Aḥmad Dārimī Ḥākim Ibn Ḥibbān Ṭabarānī Nasāʾī's Kubrá Bayhaqī al-Luʾluʾ wa-al-Marjān Ibn Rajab's Fifty Riyāḍ al-Ṣāliḥīn Aḥmad's Zuhd Suyūṭī
tabarani:11081 – Muḥammad b. Ruzayq b. Jāmiʿ al-Miṣrī > al-Haytham b. Ḥabīb > Sallām al-Ṭawīl > Ḥamzah al-Zayyāt > Layth > Mujāhid > Ibn ʿAbbās

[Machine] The Messenger of Allah ﷺ said, "Whoever fasts the Day of Arafah, it expiates for him the sins of two years."  

الطبراني:١١٠٨١ – حَدَّثَنَا مُحَمَّدُ بْنُ رُزَيْقِ بْنِ جَامِعٍ الْمِصْرِيُّ ثنا الْهَيْثَمُ بْنُ حَبِيبٍ ثنا سَلَّامُ الطَّوِيلُ عَنْ حَمْزَةَ الزَّيَّاتِ عَنْ لَيْثٍ عَنْ مُجَاهِدٍ عَنِ ابْنِ عَبَّاسٍ ؓ قَالَ

قَالَ رَسُولُ اللهِ ﷺ «مَنْ صَامَ يَوْمَ عَرَفَةَ كَانَ لَهُ كَفَّارَةَ سَنَتَيْنِ»  

See similar narrations below:

Collected by Dārimī, Ṭabarānī, Suyūṭī
darimi:2755 – Isḥāq b. ʿĪsá > ʿAbdullāh b. ʿUqbah > Yazīd b. ʿAmr > Abū ʿAbd al-Raḥman al-Ḥubulī > ʿAbdullāh b. ʿAmr b. al-ʿĀṣ

"Whoever is silent, he is saved." (Using translation from Tirmidhī 2501)  

الدارمي:٢٧٥٥ – أَخْبَرَنَا إِسْحَاقُ بْنُ عِيسَى عَنْ عَبْدِ اللَّهِ بْنِ عُقْبَةَ عَنْ يَزِيدَ بْنِ عَمْرٍو عَنْ أَبِي عَبْدِ الرَّحْمَنِ الْحُبُلِيِّ عَنْ عَبْدِ اللَّهِ بْنِ عَمْرِو بْنِ الْعَاصِ قَالَ

قَالَ رَسُولُ اللَّهِ ﷺ «مَنْ صَمَتَ نَجَا»  

tabarani:5923 – [Chain 1] ʿUbayd b. Ghannām > Abū Bakr b. Abū Shaybah [Chain 2] ʿAbdān b. Aḥmad And al-Ḥusayn b. Isḥāq al-Tustarī > ʿUthmān b. Abū Shaybah > Muʿāwiyah b. Hishām

[Machine] The Messenger of Allah ﷺ said, "Whoever fasts on the day of Arafah, his sins of two consecutive years will be forgiven."  

الطبراني:٥٩٢٣ – حَدَّثَنَا عُبَيْدُ بْنُ غَنَّامٍ ثنا أَبُو بَكْرِ بْنُ أَبِي شَيْبَةَ ح وَحَدَّثَنَا عَبْدَانُ بْنُ أَحْمَدَ وَالْحُسَيْنُ بْنُ إِسْحَاقَ التُّسْتَرِيُّ قَالَا ثنا عُثْمَانُ بْنُ أَبِي شَيْبَةَ قَالَا ثنا مُعَاوِيَةُ بْنُ هِشَامٍ ثنا أَبُو حَفْصٍ الطَّائِفِيُّ عَنْ أَبِي حَازِمٍ عَنْ سَهْلِ بْنِ سَعْدٍ قَالَ

قَالَ رَسُولُ اللهِ ﷺ «مَنْ صَامَ يَوْمَ عَرَفَةَ غُفِرَ لَهُ ذَنْبُ سَنَتَيْنِ مُتَتابِعَتَيْنِ»