‏الحيض : Hadeeth No:597 'A'isha reported: Whenever the Messenger of Allaah (sallAllaahu alayhi wa sallam) intended to sleep after having sexual intercourse, he performed ablution as for the prayer before going to sleep....

‏الإمارة : Hadeeth No:4556 The same tradition has been narrated by the same authority through another chain of transmitters with a slight difference in wording....