‏الصلاة : Hadeeth No:1551 Mua'ada 'Adawiyya reported 'A'isha as saying: The Messenger of Allaah (sallAllaahu alayhi wa sallam) used to observe four rak'ahs in the forenoon prayer and he sometimes observed more as Allaah pleased....

‏الإمارة : Hadeeth No:4575 The above tradition has been narrated through a different chain of transmitters....