‏الصلاة : Hadeeth No:737 Anas b. Malik reported: They (the Companions) discussed that they should know the timings of prayer by means of something recognized by all. Some of them said that fire should be lighted or a bell should be rung. But Bilal was ordered to repeat the phrases twice in Adhan, and once in Iqama....

‏الإمارة : Hadeeth No:4660 It has been reported on the authority of Abu Huraira that the Messenger of Allaah (sallAllaahu alayhi wa sallam) said: God laughs at the two men one of whom kills the other; both of them will enter Paradise. They (the Companions) said: How, Messenger of Allaah? He said: One is slain (in the way of A...