Riyad as-Salihin, Book 19, Hadith 1857 (In-Book) ⓘ
'Aishah (May Allah be pleased with her) said: The Prophet 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 صلى الله عليه وسلم قال: "الحمى فيح جهنم فأبردوها بالماء" ((متفق عليه)).