Arabic (Original)
حَدَّثَنَا مُعَاذُ بْنُ مُعَاذٍ حَدَّثَنَا حَاجِبُ بْنُ عُمَرَ حَدَّثَنِي عَمِّي الْحَكَمُ بْنُ الْأَعْرَجِ قَالَ أَتَيْتُ ابْنَ عَبَّاسٍ وَهُوَ مُتَّكِئٌ عِنْدَ زَمْزَمَ فَجَلَسْتُ إِلَيْهِ وَكَانَ نِعْمَ الْجَلِيسُ فَقُلْتُ أَخْبِرْنِي عَنْ يَوْمِ عَاشُورَاءَ قَالَ عَنْ أَيِّ بَالِهِ تَسْأَلُ قُلْتُ عَنْ صَوْمِهِ قَالَ إِذَا رَأَيْتَ هِلَالَ الْمُحَرَّمِ فَاعْدُدْ فَإِذَا أَصْبَحْتَ مِنْ تَاسِعَةٍ فَأَصْبِحْ مِنْهَا صَائِمًا قُلْتُ أَكَذَاكَ كَانَ يَصُومُهُ مُحَمَّدٌ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ قَالَ نَعَمْ.
English Translation
I came to Ibn Abbas while he was reclining near Zamzam. I sat with him and he was the best of companions. I said: 'Tell me about the day of Ashura.' He said: 'What do you want to know about it?' I said: 'About its fasting.' He said: 'When you see the crescent of Muharram, count, and when you reach the morning of the ninth, fast.' I said: 'Is this how the Messenger of Allah (peace be upon him) used to fast it?' He said: 'Yes.'