question #1 Sahih al-Bukhari 308, Book 6, Hadith 13 : What steps should be taken to clean a garment that has been stained with menstrual blood before performing prayers?

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.