(4) باب ذِكْرِ الأَقْرَاءِ
It was narrated that 'Aishah said:
Fatimah bint Abi Hubaish came to the Messenger of Allah (ﷺ) and said: "I am a woman who suffers from Istihadah and I never become pure. Should I stop praying?" He said: "No, that is a vein, it is not menstruation. When your period comes, stop praying, and when it goes, wash the blood from yourself and pray."
Reference: Sunan an-Nasa'i 359
In-book reference: Book 3, Hadith 11
English translation: Vol. 1, Book 3, Hadith 359