(9) باب غَسْلِ دَمِ الْمَحِيضِ
Narrated `Aisha:
Whenever anyone of us got her menses, she, on becoming clean, used to take hold of the blood spot and rub the blood off her garment, and pour water over it and wash that portion thoroughly and sprinkle water over the rest of the garment. After that she would pray in (with) it.
Reference: Sahih al-Bukhari 308
In-book reference: Book 6, Hadith 13
USC-MSA web (English) reference(deprecated numbering scheme): Vol. 1, Book 6, Hadith 305