Sunan An-Nasa'i

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 (non-menstrual vaginal bleeding) and I never become pure. Should I stop praying?"" He said: ""No, that is a vein, it is not menstruation. When you period comes, stop praying, and when it goes, wash the blood from yourself and pray