حَدَّثَنِي يَحْيَى، عَنْ مَالِكٍ، عَنْ هِشَامِ بْنِ عُرْوَةَ، عَنْ أَبِيهِ، عَنْ عَائِشَةَ، زَوْجِ النَّبِيِّ صلى الله عليه وسلم أَنَّهَا قَالَتْ قَالَتْ فَاطِمَةُ بِنْتُ أَبِي حُبَيْشٍ يَا رَسُولَ اللَّهِ إِنِّي لاَ أَطْهُرُ أَفَأَدَعُ الصَّلاَةَ فَقَالَ لَهَا رَسُولُ اللَّهِ صلى الله عليه وسلم " إِنَّمَا ذَلِكِ عِرْقٌ وَلَيْسَتْ بِالْحَيْضَةِ فَإِذَا أَقْبَلَتِ الْحَيْضَةُ فَاتْرُكِي الصَّلاَةَ فَإِذَا ذَهَبَ قَدْرُهَا فَاغْسِلِي الدَّمَ عَنْكِ وَصَلِّي " .
Yahya related to me from Malik from Hisham ibn Urwa from hisfather that A'isha, the wife of the Prophet, may Allah bless him andgrant him peace, said, "Fatima bint Abu Hubaysh said, 'Messenger ofAllah, I never become pure - am I permitted to pray?' The Messenger ofAllah, may Allah bless him and grant him peace, said, 'That is a vein,not menstruation. So when your period approaches, leave off from theprayer, and when its grip leaves, wash the blood from yourself andpray.' " Translation Not Available
Book Ref: Muwatta Imam Malik Book 2 Hadith 135
Web Ref: Muwatta Imam Malik Book 2 Hadith 106