The Book of Greetings
39/26. Chapter:
For Every Disease There Is A Remedy, And It Is Recommended To Treat Disease
Sahih Muslim
حَدَّثَنَا زُهَيْرُ بْنُ حَرْبٍ، وَمُحَمَّدُ بْنُ الْمُثَنَّى، قَالاَ حَدَّثَنَا يَحْيَى، - وَهُوَ ابْنُ سَعِيدٍ - عَنْ عُبَيْدِ اللَّهِ، أَخْبَرَنِي نَافِعٌ، عَنِ ابْنِ عُمَرَ، عَنِ النَّبِيِّ صلى الله عليه وسلم قَالَ " الْحُمَّى مِنْ فَيْحِ جَهَنَّمَ فَابْرُدُوهَا بِالْمَاءِ " .
Ibn Umar reported Allah's Messenger (ﷺ) as saying: The fever from the vehement raging of the (heat of Hell), so cool it with the help of water.
Reference : Sahih Muslim 2209aIn-book reference : Book 39, Hadith 105USC-MSA web (English) reference : Book 26, Hadith 5476