The Messenger of Allah (ﷺ) put out from the mosque his head for me as he was in I'tikaf, and I washed it in the state that I was menstruating.
Sahih Muslim Book 3, Hadith 8
← Previous Hadith 'A'isha, wife of the Messenger of Allah (ﷺ) observed: When I was (in I'tikaf), I entered the house for the call of nature, and while passing I inquired after the health of the sick (in the. family), and when the Messenger of Allah (ﷺ) was (in I'tikaf), he put out his head towards me, while he himself was in the mosque, and I combed his hair; and he did not enter the house except for the call of nature so long as he was In I'tikaf; and Ibn Rumh stated: As long as they (the Prophet and his wives) were among the observers of I'tikaf.

Sahih Muslim Book 3, Hadith 7 Next Hadith → The Messenger of Allah (ﷺ) inclined his head towards me (from the mosque) while I was in my apartment and I combed it in a state of menstruation.

Sahih Muslim Book 3, Hadith 9