Sahih Bukhari Volume 003, Book 033, Hadith Number 247.
Hadith Section/Book: Sahih Bukhari Sahih Bukhari Book 33. Retiring To a Masjid for Remembrance Of Allah (I'tikaf)
Narated By 'Aisha : The Prophet used to embrace me during my menses. He also used to put his head out of the mosque while he was in Itikaf, and I would wash it during my menses.