‏الحيض : Hadeeth No:679 Abu Sa'id al-Khudri reported: The Prophet of Allaah (sallAllaahu alayhi wa sallam) observed: Bathing is obligatory in case of seminal emission....

‏الصلاة : Hadeeth No:1567 'A'isha reported: The Messenger of Allaah (sallAllaahu alayhi wa sallam) used to observe two rak'ahs of Sunnah (prayer) when he heard the Adhin and shortened them. (This hadith has been narrated by the same chain of transmitters and in the hadith narrated by Usama the words are:" When it was dawn".)...