Sunan an-Nasa'i 207
سنن النسائي#207SahihIt was narrated from 'Aishah that Umm Habibah asked the Messenger of Allah (ﷺ) about bleeding. 'Aishah said:"I saw her wash tub filled with blood. The Messenger of Allah (ﷺ) said to her: 'Stop (praying) for as long as your period prevents you, then perform Ghusl.'" (Another chain)
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Abu GhuddahSahih
Al-AlbaniSahih
Zubair Ali ZaiSahih
In-book reference: 1:208