أَخْبَرَنَا عَمْرُو بْنُ عَلِيٍّ، قَالَ حَدَّثَنَا يَحْيَى، قَالَ حَدَّثَنَا سُفْيَانُ، قَالَ حَدَّثَنِي مَنْصُورٌ، عَنْ إِبْرَاهِيمَ، عَنِ الأَسْوَدِ، عَنْ عَائِشَةَ، - رضى الله عنها - قَالَتْ كَانَ النَّبِيُّ صلى الله عليه وسلم يُومِئُ إِلَىَّ رَأْسَهُ وَهُوَ مُعْتَكِفٌ فَأَغْسِلُهُ وَأَنَا حَائِضٌ ‏.‏

It was narrated that 'Aishah said: "The Prophet (PBUH) would put his head out while he was in I'tikaf and I would wash it, while I was menstruating." Translation Not Available

Book Ref: Sunan An Nisai Book 1 Hadith 276
Web Ref:  Sunan An Nisai Not Available