Sahih al-Bukhari 1892
Book 30: Fasting · Hadith 2
Hadith text
حَدَّثَنَا مُسَدَّدٌ، حَدَّثَنَا إِسْمَاعِيلُ، عَنْ أَيُّوبَ، عَنْ نَافِعٍ، عَنِ ابْنِ عُمَرَ ـ رضى الله عنهما ـ قَالَ صَامَ النَّبِيُّ صلى الله عليه وسلم عَاشُورَاءَ، وَأَمَرَ بِصِيَامِهِ. فَلَمَّا فُرِضَ رَمَضَانُ تُرِكَ. وَكَانَ عَبْدُ اللَّهِ لاَ يَصُومُهُ، إِلاَّ أَنْ يُوَافِقَ صَوْمَهُ.
Narrated Ibn `Umar:The Prophet (ﷺ) observed the fast on the 10th of Muharram ('Ashura), and ordered (Muslims) to fast on that day, but when the fasting of the month of Ramadan was prescribed, the fasting of the 'Ashura' was abandoned. `Abdullah did not use to fast on that day unless it coincided with his routine fasting by chance
Ibn Umar (رضی اللہ عنہما) bataate hain: Nabi ne Muharram ki das taareekh (Ashura) ka roza rakha, aur (Musalmanon ko) uska roza rakhne ka hukum diya, magar jab Ramadan ke roze farz kiye gaye, Ashura ka roza chhod diya gaya. Abdullah is din roza nahi rakhte the siwaye jab yeh unki aam roze ki tareekh se milta.
Sahih al-Bukhari 1892 · Book 30, Hadith 2