Jabir b Samura reported that the Messenger of Allah (ﷺ) commanded us to observe fast on the day of Ashura and exhorted us to do it and was particular about it But when (fasting) in Ramadan was made obligatory, he hence. forth neither commanded us nor forbade us, nor was he so particular about it.
Reference | : Sahih Muslim 1128 |
In-book reference | : Book 13, Hadith 158 |
USC-MSA web (English) reference | : Book 6, Hadith 2514 |
(deprecated numbering scheme) |