‏الصلاة : Hadeeth No:1549 Mu'adha asked 'A'isha (Allaah be pleased with her) how many rak'ahs Allaah's Messenger (sallAllaahu alayhi wa sallam) prayed at the forenoon prayer. She replied: Four rak'ahs, but sometimes more as he pleased....

‏الصلاة : Hadeeth No:2071 'A'isha reported Allaah's Prophet (sallAllaahu alayhi wa sallam) saying: If a company of Muslims numbering one hundred pray over a dead person, all of them interceding for him, their intercession for him will be accepted....