حَدَّثَنَا عَبْدُ اللَّهِ بْنُ مُحَمَّدٍ حَدَّثَنَا ابْنُ عُيَيْنَةَ عَنْ الزُّهْرِيِّ عَنْ عُرْوَةَ عَنْ عَائِشَةَ رَضِيَ اللَّهُ عَنْهَا کَانَ عَاشُورَائُ يُصَامُ قَبْلَ رَمَضَانَ فَلَمَّا نَزَلَ رَمَضَانُ قَالَ مَنْ شَائَ صَامَ وَمَنْ شَائَ أَفْطَرَ
صحیح بخاری · Hadith 4504
Narrated Aisha: During the Pre-lslamic Period of ignorance the Quraish used to observe fasting on the day of 'Ashura', and the Prophet himself used to observe fasting on it too. But when he came to Medina, he fasted on that day and ordered the Muslims to fast on it. When (the order of compulsory fasting in ) Ramadan was revealed, fasting in Ramadan became an obligation, and fasting on 'Ashura' was given up, and who ever wished to fast (on it) did so, and whoever did not wish to fast on it, did not fast.
Translated by Dr. Muhammad Muhsin Khan · Reviewed by Islamic University of Madinah · Published March 2020