(13) باب دَلْكِ الْمَرْأَةِ نَفْسَهَا إِذَا تَطَهَّرَتْ مِنَ الْمَحِيضِ وَكَيْفَ تَغْتَسِلُ، وَتَأْخُذُ فِرْصَةً مُمَسَّكَةً فَتَتَّبِعُ بِهَا أَثَرَ الدَّمِ
Narrated `Aisha:
A woman asked the Prophet (ﷺ) about the bath which is taken after finishing from the menses. The Prophet (ﷺ) told her what to do and said, "Purify yourself with a piece of cloth scented with musk." The woman asked, "How shall I purify myself with it" He said, "Subhan Allah! Purify yourself (with it)." I pulled her to myself and said, "Rub the place soiled with blood with it."
Reference: Sahih al-Bukhari 314
In-book reference: Book 6, Hadith 19
USC-MSA web (English) reference(deprecated numbering scheme): Vol. 1, Book 6, Hadith 311