Sahih al-Bukhari 308

Asbagh narrated to us, saying: Ibn Wahb informed me, saying: Amr ibn al-Harith informed me, from Abd al-Rahman ibn al-Qasim, who told him, from his father, from Aishah, who said: “When one of us menstruated and then became pure, she would rub the blood from her garment and wash it, sprinkle water over the rest of the garment, then pray in it.”