´It was narrated from Asma' bint Abi Bakr taht 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 / Mention When Ghusal (A Purifying Bath) Is Obligatory And When It Is Not / Hadith: 294
Hadith Gradingالألبانی:صحيح | زبیر علی زئی:متفق عليه