Retiring to a Mosque for Remembrance of Allah (I'tikaf)
33/2. Chapter:
A menstruating woman is permitted to comb the hair of a man in I'tikaf.
Sahih Bukhari
حَدَّثَنَا مُحَمَّدُ بْنُ الْمُثَنَّى، حَدَّثَنَا يَحْيَى، عَنْ هِشَامٍ، قَالَ أَخْبَرَنِي أَبِي، عَنْ عَائِشَةَ ـ رضى الله عنها ـ قَالَتْ كَانَ النَّبِيُّ صلى الله عليه وسلم يُصْغِي إِلَىَّ رَأْسَهُ وَهْوَ مُجَاوِرٌ فِي الْمَسْجِدِ، فَأُرَجِّلُهُ وَأَنَا حَائِضٌ.
Narrated `Aisha: The Prophet (ﷺ) used to (put) bend his head (out) to me while he was in I`tikaf in the mosque during my monthly periods and I would comb and oil his hair.
Reference : Sahih al-Bukhari 2028In-book reference : Book 33, Hadith 4USC-MSA web (English) reference : Vol. 3, Book 33, Hadith 245