Sahih Muslim 776
صحيح مسلم#776SahihAbu Sa'id al-Khudri reported:The Apostle of Allah (ﷺ) observed: Bathing is obligatory in case of seminal emission
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: 3:98