Sunan An-Nasai, Chapter: The Book of Purification

that a woman asked the Prophet (saw) about performing Ghusl following menstruation and he told her how to perform Ghusl. Then he said: "Take a piece of cloth perfumed with musk and purify yourself with it." She said: "How should I purify myself with it?" He covered his face then said: "Subhan Allah! Purify yourself with it." Aisha said: "I took the woman aside and said: 'Wipe away the traces of blood with it.'" (Sahih)