Sahih al-Bukhari 7357

Mansur ibn Safiyya related from Safiyya [bint Shayba] that 'A'isha that a woman [Asma' bint Shakal] asked the Prophet, may Allah bless him and grant him peace... Mansur ibn 'Abdu'r-Rahman ibn Shayba related from his mother [Safiyya bint Shayba] from 'A'isha that a woman asked the Prophet, may Allah bless him and grant him peace, about mesntruation and how to perform the ghusl after it. He said, "Take a piece of cloth scented with musk and clean yourself with it." She asked, "How should I clean myself with it, Messenger of Allah?" The Prophet, may Allah bless him and grant him peace, said, "Clean yourself with it." She repeated, "How should I clean myself with it, Messenger of Allah?" The Prophet, may Allah bless him and grant him peace, said, "Clean yourself with it." 'A'isha said, "I recognised what the Messenger of Allah, may Allah bless him and grant him peace, meant, so I pulled her to me and taught her."