‏الصلاة : Hadeeth No:1264 A'isha reported: The Messenger of Allaah (sallAllaahu alayhi wa sallam) said: He who finds a prostration before sunset or at dawn (prayer) before the rising (of the sun) he Id fact finds that (prayer), and prostration implies a rak'ah....

‏الحيض : Hadeeth No:726 Ibn 'Abbas reported: We were with the Prophet of Allaah (sallAllaahu alayhi wa sallam) and he had come out of the privy. Food was presented to him. It was said to him (by the Companions around him): Wouldn't you perform ablution? Upon this he said: Why, am I to say prayer that I should perform ablut...