It was narrated from 'Aishah that Fatimah bint Abi Hubaish suffered from Istihadah (non-menstrual vaginal bleeding). The Messenger of Allah (ﷺ) said to her: "Menstrual blood is blood that is black and recognizable, so if it is like that, then stop praying, and if it is otherwise, then perform Wudu' and pray." Abu 'Abdur-Rahman said: Others reported this Hadith, and none of them mentioned what Ibn Abi 'Adi mentioned. And Allah Most High, knows best.