‏الطهارة : Hadeeth No:546 Abu Huraira reported the Messenger of Allaah (sallAllaahu alayhi wa sallam) to have said: When a dog licks a utensil belonging to any one of you, (the thing contained in it) should be thrown away and then (the utensil) should be washed seven times....

‏الصلاة : Hadeeth No:1618 'A'isha reported: The Messenger of Allaah (sallAllaahu alayhi wa sallam) used to pray in the night and when he observed Witr, he said to me: O 'A'isha, get up and observe Witr....