Sahih al-Bukhari 4501

Prophetic Commentary on the Qur'an (Tafseer of the Prophet (pbuh))

#4501Book 65

حَدَّثَنَا مُسَدَّدٌ، حَدَّثَنَا يَحْيَى، عَنْ عُبَيْدِ اللَّهِ، قَالَ أَخْبَرَنِي نَافِعٌ، عَنِ ابْنِ عُمَرَ ـ رضى الله عنهما ـ قَالَ كَانَ عَاشُورَاءُ يَصُومُهُ أَهْلُ الْجَاهِلِيَّةِ، فَلَمَّا نَزَلَ رَمَضَانُ قَالَ ‏ "‏ مَنْ شَاءَ صَامَهُ، وَمَنْ شَاءَ لَمْ يَصُمْهُ ‏"‏‏.‏

Narrated Ibn `Umar:Fasting was observed on the day of 'Ashura' (i.e. 10th of Muharram) by the people of the Pre-Islamic Period. But when (the order of compulsory fasting) in the month of Ramadan was revealed, the Prophet said, "It is up to one to fast on it (i.e. day of 'Ashura') or not

Reference
Sahih al-Bukhari 4501
In-book
Book 65, Hadith 28
English
Muhsin Khan