Arabic (Original)
حَدَّثَنَا يَحْيَى بْنُ سَعِيدٍ حَدَّثَنَا سُفْيَانُ عَنْ مَنْصُورٍ عَنْ مُجَاهِدٍ عَنْ حَرْمَلَةَ بْنِ إِيَاسٍ عَنْ أَبِي قَتَادَةَ قَالَ قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ صَوْمُ يَوْمِ عَرَفَةَ يُكَفِّرُ سَنَتَيْنِ مَاضِيَةً وَمُسْتَقْبَلَةً وَصَوْمُ عَاشُورَاءَ يُكَفِّرُ سَنَةً مَاضِيَةً.
English Translation
Yahya ibn Sa'id narrated to us, Sufyan narrated to us, from Mansur, from Mujahid, from Harmalah ibn Iyas, from Abu Qatadah, who said: The Messenger of Allah (peace and blessings of Allah be upon him) said: "Fasting on the day of Arafah expiates the sins of two years: the past year and the coming year. And fasting on the day of Ashura expiates the sins of the past year."