Narrated Ibn `Umar:
Fasting was observed on the day of 'Ashura' (i.e. 10th of Muharram) by the people of the Pre-lslamic 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 reference | : Book 65, Hadith 28 |
USC-MSA web (English) reference | : Vol. 6, Book 60, Hadith 28 |
(deprecated numbering scheme) |