Aishah said: Umm Habibah had a prolonged flow of blood for seven years. The Messenger of Allah ﷺ commanded her to take bath; so shed used to take bath for every prayer.
Hadith Referenceسنن ابي داود / كتاب الطهارة / 291
Hadith Gradingالألبانی:صحيح | زبیر علی زئی:صحيح بخاري (327) صحيح مسلم (334)