English translation
3831. Narrated 'Aishah رضي الله عنها ‘Āshūrā' (i.e., the tenth of Muḥarram) was a day on which the tribe of Quraish used to observe fasting in the Pre-Islāmic Period of Ignorance. The Prophet ﷺ also used to observe Ṣaum (fast) on this day. So when he emigrated to Al-Madīna, he observed fasting on it and ordered (the Muslims) to fast on it. When the fasting of (the month of) Ramaḍān was enjoined, it became optional for the people to observe fast or not to observe fast on the day of ‘Āshūrā'.
