Sahih Bukhari Volume 003, Book 033, Hadith Number 246.
Hadith Section/Book: Sahih Bukhari Sahih Bukhari Book 33. Retiring To a Masjid for Remembrance Of Allah (I'tikaf)
Narated By 'Aisha : (The wife of the Prophet) Allah's Apostle used to let his head in (the house) while he was in the mosque and I would comb and oil his hair. When in Itikaf he used not to enter the house except for a need.