Caution: Translations of Quran and Ḥadīth may lead to possible misapplications and misinterpretations. This site is intended for students of sacred knowledge that are proficient in comprehending classical Arabic and have a strong foundation in Islamic sciences. Also note that religious injunctions rely on several aspects beyond what one may glean through reading individual aḥādīth.
ibnmajah:3475Abū Salamah Yaḥyá b. Khalaf > ʿAbd al-Aʿlá > Saʿīd > Qatādah > al-Ḥasan > Abū Hurayrah

“Fever is one of the bellows of Hell, so avert it from yourselves with cold water.”  

ابن ماجة:٣٤٧٥حَدَّثَنَا أَبُو سَلَمَةَ يَحْيَى بْنُ خَلَفٍ حَدَّثَنَا عَبْدُ الأَعْلَى عَنْ سَعِيدٍ عَنْ قَتَادَةَ عَنِ الْحَسَنِ عَنْ أَبِي هُرَيْرَةَ

أَنَّ رَسُولَ اللَّهِ ﷺ قَالَ الْحُمَّى كِيرٌ مِنْ كِيرِ جَهَنَّمَ فَنَحُّوهَا عَنْكُمْ بِالْمَاءِ الْبَارِدِ  


See similar narrations below:

Collected by Bukhārī, Mālik, Suyūṭī
bukhari:3262ʿAmr b. ʿAbbās > ʿAbd al-Raḥman > Sufyān from his father > ʿAbāyah b. Rifāʿah > Rāfiʿ b. Khadīj

I heard the Prophet ﷺ saying, "Fever is from the heat of the (Hell) Fire; so cool it with water."  

البخاري:٣٢٦٢حَدَّثَنِي عَمْرُو بْنُ عَبَّاسٍ حَدَّثَنَا عَبْدُ الرَّحْمَنِ حَدَّثَنَا سُفْيَانُ عَنْ أَبِيهِ عَنْ عَبَايَةَ بْنِ رِفَاعَةَ قَالَ أَخْبَرَنِي رَافِعُ بْنُ خَدِيجٍ قَالَ

سَمِعْتُ النَّبِيَّ ﷺ يَقُولُ الْحُمَّى مِنْ فَوْرِ جَهَنَّمَ فَأَبْرِدُوهَا عَنْكُمْ بِالْمَاءِ  

malik:50-16Mālik > Hishām b. ʿUrwah from his father

Yahya related to me from Malik from Hisham ibn Urwa from his father that the Messenger of Allah ﷺ said, "Fever is from the vehemence of the heat of Jahannam, so cool it with water."  

مالك:٥٠-١٦وَحَدَّثَنِي عَنْ مَالِكٍ عَنْ هِشَامِ بْنِ عُرْوَةَ عَنْ أَبِيهِ

أَنَّ رَسُولَ اللَّهِ ﷺ قَالَ إِنَّ الْحُمَّى مِنْ فَيْحِ جَهَنَّمَ فَابْرُدُوهَا بِالْمَاءِ