Sunan an-Nasa'i 365
سنن النسائي#365SahihIt was narrated that 'Aishah said:"Fatimah bint Abi Hubaish said to the Messenger of Allah (ﷺ): 'O Messenger of Allah (ﷺ), I do not become pure. Should I stop praying?' The Messenger of Allah (ﷺ) said: 'That is a vein and is not menstruation. When your period comes, stop praying, and when it has passed, then wash the blood from yourself and pray
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Abu Ghuddah-
Zubair Ali ZaiSahih - Agreed Upon
In-book reference: 3:17