It is narrated from Sayyida Aisha (may Allah be pleased with her) that the Messenger of Allah (peace and blessings be upon him) would incline his blessed head from the mosque towards my chamber while he was in i'tikaf, and I would be menstruating, yet I would wash his blessed head.
Hadith Referenceالسنن المأثورة / باب ما جاء في الاعتكاف / 351
Hadith Takhrijصحیح بخاری، الحیض، باب مباشرۃ الحیض، رقم : 301، صحیح مسلم الحیض باب جواز غسل الحائض رأس زوجہا و ترجیلہ رقم : 297