(11) باب هَلْ تُصَلِّي الْمَرْأَةُ فِي ثَوْبٍ حَاضَتْ فِيهِ
Narrated `Aisha:
None of us had more than a single garment and we used to have our menses while wearing it. Whenever it got soiled with blood of menses we used to apply saliva to the blood spot and rub off the blood with our nails.
Reference: Sahih al-Bukhari 312
In-book reference: Book 6, Hadith 17
USC-MSA web (English) reference(deprecated numbering scheme): Vol. 1, Book 6, Hadith 309