ßÊÇÈ ÇáÊÝÓíÑ : Hadeeth No:4176 : 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."...
ßÊÇÈ ÇáÅíãÇä : Hadeeth No:54 : Jarir bin Abdullah:
I gave the pledge of allegiance to Allah's Apostle for the following:
1. offer prayers perfectly
2. pay the Zakat (obligatory charity)
3. and be sincere and true to every Muslim.
...