Sahih al-Bukhari 2046
Sahih al-Bukhari · Book 33: Retiring to a Mosque for Remembrance of Allah (I'tikaf) · A Mu'takif can let his head in the house for washing
Narrated `Urwa:
حَدَّثَنَا عَبْدُ اللَّهِ بْنُ مُحَمَّدٍ ، حَدَّثَنَا هِشَامٌ ، أَخْبَرَنَا مَعْمَرٌ ، عَنِ الزُّهْرِيِّ ، عَنْ عُرْوَةَ ، عَنْ عَائِشَةَ ـ رضى الله عنها ـ أَنَّهَا كَانَتْ تُرَجِّلُ النَّبِيَّ صلى الله عليه وسلم وَهِيَ حَائِضٌ وَهْوَ مُعْتَكِفٌ فِي الْمَسْجِدِ وَهْىَ فِي حُجْرَتِهَا، يُنَاوِلُهَا رَأْسَهُ.
Aisha during her menses used to comb and oil the hair of the Prophet (ﷺ) while he used to be in I`tikaf in the mosque. He would stretch out his head towards her while she was in her chamber.