‏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....

‏الصلاة : Hadeeth No:739 Anas reported: Bilal was commanded (by the Prophet) to repeat the phrases twice in Adhan, and once in lqama....