Riyad as-Saliheen 1857
'Aishah (May Allah be pleased with her) said:
The Prophet ﷺ said, "Fever comes from the vehement raging of Hell, so cool it with water."
[Al-Bukhari and Muslim].
وعن عائشة رضي الله عنها أن النبي ﷺ قال:
"الحمى فيح جهنم فأبردوها بالماء" ((متفق عليه)).
Classification
Sahih (Authentic)
References
Riyad as-Saliheen 1857
Riyad as-Saliheen Book of Miscellaneous ahadith of Significant Values, Hadith 50