Sahih Muslim 4942
صحيح مسلم#4942SahihA version of the tradition narrated on the authority of Suhail contains the additional words:" And one who is drowned is a martyr
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: 33:237