Sahih Muslim 5122
صحيح مسلم#5122SahihAmr b. Muslim b. 'Ammar al-Laithi reported:While we were in a bathroom just before 'Id al-Adha some of the persons tried to remove the hair with the help of hair-removing chemicals. Thereupon some of the people owning the bath (or some of the people sitting therein) said that Sa'id b. Musayyib did not approve of it, or he prohibited it. Then I met Sa'id b. Musayyib and made a mention of that to him, whereupon he said: O my nephew, this is the hadith which has been forgotten, and abandoned. Umm Salama, the wife of Allah's Apostle (ﷺ), narrated to me Allah's Messenger (ﷺ) having said as narrated above
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: 35:58