Sunan Ibn Majah, Hadith 633 ⓘ
It was narrated that 'Aishah said: "The Prophet used to bring his head close to me when I was menstruaring and he was in I'tikaf (seclusion in a mosques for the purpose of worship), and I would wash it and comb his hair."
حَدَّثَنَا أَبُو بَكْرِ بْنُ أَبِي شَيْبَةَ، وَعَلِيُّ بْنُ مُحَمَّدٍ، قَالاَ حَدَّثَنَا وَكِيعٌ، عَنْ هِشَامِ بْنِ عُرْوَةَ، عَنْ أَبِيهِ، عَنْ عَائِشَةَ، قَالَتْ كَانَ النَّبِيُّ ـ صلى الله عليه وسلم ـ يُدْنِي رَأْسَهُ إِلَىَّ وَأَنَا حَائِضٌ وَهُوَ مُجَاوِرٌ - تَعْنِي مُعْتَكِفًا - فَأَغْسِلُهُ وَأُرَجِّلُهُ .
also referenced under: Book 1, Hadith 676 (In-Book) & Volume 1, Book 1, Hadith 633 (DarusSalam)