´It was narrated from Asma' bint Abi Bakr that a woman asked the Messenger of Allah (ﷺ) about menstrual blood that gets on clothes. He said:` "Scratch it, then rub it with water, then sprinkle water over it, and pray in it."
Hadith ReferenceSunan an-Nasa'i / The Book of Menstruation and Istihadah / Hadith: 394