وَحَدَّثَنِي عَنْ مَالِكٍ، عَنْ هِشَامِ بْنِ عُرْوَةَ، عَنْ أَبِيهِ، عَنْ عَائِشَةَ، زَوْجِ النَّبِيِّ صلى الله عليه وسلم أَنَّهَا قَالَتْ كُنْتُ أُرَجِّلُ رَأْسَ رَسُولِ اللَّهِ صلى الله عليه وسلم وَأَنَا حَائِضٌ ‏.‏

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, "I used to comb the head of the Messenger ofAllah, may Allah bless him and grant him peace, while I wasmenstruating." Translation Not Available

Book Ref: Muwatta Imam Malik Book 2 Hadith 133
Web Ref:  Muwatta Imam Malik Book 2 Hadith 104