Sahih Muslim 4942
صحيح مسلم#4942Sahihحَدَّثَنِي عَبْدُ الْحَمِيدِ بْنُ بَيَانٍ الْوَاسِطِيُّ، حَدَّثَنَا خَالِدٌ، عَنْ سُهَيْلٍ، بِهَذَا الإِسْنَادِ . مِثْلَهُ غَيْرَ أَنَّ فِي حَدِيثِهِ قَالَ سُهَيْلٌ قَالَ عُبَيْدُ اللَّهِ بْنُ مِقْسَمٍ أَشْهَدُ عَلَى أَبِيكَ أَنَّهُ زَادَ فِي هَذَا الْحَدِيثِ " وَمَنْ غَرِقَ فَهُوَ شَهِيدٌ " .
A version of the tradition narrated on the authority of Suhail contains the additional words:" And one who is drowned is a martyr
Scholarly Authentication
The label above is the grade most of these scholars gave — one dissenting opinion no longer speaks for all of them. If any scholar calls a narration fabricated, that verdict is shown instead, whatever the others say. Each scholar's own wording:
Every narration in Sahih Muslim is accepted as Sahih (authentic) by the established status of the book.
In-book reference: 33:237