Arabic (Original)
حَدَّثَنَا عَفَّانُ حَدَّثَنَا هَمَّامٌ قَالَ سُئِلَ عَطَاءُ بْنُ أَبِي رَبَاحٍ وَأَنَا شَاهِدٌ عَنْ الْفَضْلِ فِي صَوْمِ يَوْمِ عَرَفَةَ فَقَالَ جَاءَ هَذَا مِنْ قِبَلِكُمْ يَا أَهْلَ الْعِرَاقِ حَدَّثَنِيهِ أَبُو الْخَلِيلِ عَنْ حَرْمَلَةَ بْنِ إِيَاسٍ عَنْ أَبِي قَتَادَةَ أَنَّ النَّبِيَّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ قَالَ كَلِمَةً تُشْبِهُ عَدْلَ ذَلِكَ قَالَ صَوْمُ عَرَفَةَ بِصَوْمِ سَنَتَيْنِ وَصَوْمُ عَاشُورَاءَ بِصَوْمِ سَنَةٍ.
English Translation
'Affan narrated to us, Hammam narrated to us. He said: 'Ata' ibn Abi Rabah was asked - and I was present - about the virtue of fasting the day of Arafah. He said: This came from your side, O people of Iraq. Abu al-Khalil narrated it to me, from Harmalah ibn Iyas, from Abu Qatadah, that the Prophet (peace and blessings of Allah be upon him) said a word resembling the equivalent of that. He said: "Fasting on Arafah is equivalent to fasting two years, and fasting on Ashura is equivalent to fasting one year."