Sahih Muslim 749
صحيح مسلم#749SahihA'isha reported:A woman asked the Messenger of Allah (ﷺ) how he should wash herself after the menstrual period. He (the Holy Prophet) said: Take a cotton with musk and purity yourself, and the rest of the hadith was narrated like that of Sufyan
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: 3:71