Sahih Muslim 5752
صحيح مسلم#5752SahihIbn Umar reported Allah's Apostle (ﷺ) as saying:Fever is due to vehemence of the heat of Hell, so cool it with water
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: 39:106