Sahih Bukhari
Retiring to a Mosque for Remembrance of Allah (Itikaf)
Volume: 003 / Book Number: 033 / Hadith Number: 262
Narrated 'Urwa:
Aisha during her menses used to comb and oil the hair of the Prophet while he used to be in Itikaf in the mosque. He would stretch out his head towards her while she was in her chamber.