Sahih Muslim 755
صحيح مسلم#755SahihA'isha reported:Umm Habiba b. Jahsh thus asked for a verdict from the Messenger of Allah (ﷺ): I am a woman whose blood keeps flowing (after the menstrual period). He (the Holy Prophet) said: That is only a vein, so take a bath and offer prayer; and she took a bath at the time of every prayer. Laith b. Sa'd said: Ibn Shihab made no mention that the Messenger of Allah (ﷺ) had ordered her to take a bath at the time of every prayer, but she did it of her own accord. And in the tradition transmitted by Ibn Rumh there is no mention of Umm Habiba (and there is mention of the daughter of Jahsh only)
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Every narration in Sahih Muslim is accepted as Sahih (authentic) by the established status of the book.
In-book reference: 3:77