‏الصيام : Hadeeth No:2501 'A'isha (Allaah be pleased with her) reported. In the pre-Islamic days fast was observed on the day of Ashura, but with the advent of Islam (its position was ascertained as that of a voluntary fast). Then he who wished to fast fasted, and he who liked to abandon it abandoned it....

‏الإمارة : Hadeeth No:4490 It has been reported on the authority of Abu Musa who said: I went to the Prophet (sallAllaahu alayhi wa sallam) and with me were two men from the Ash'ari tribe. One of them was on my right hand and the other on my left. Both of them made a request for a position (of authority) while the Prophet (sa...