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.
tirmidhi:2074Hārūn b. Isḥāq al-Hamdānī > ʿAbdah b. Sulaymān > Hishām b. ʿUrwah from his father > ʿĀʾishah

"Fever is from the heat of the Hell, so cool it with water." Another chain reports similar narration.  

الترمذي:٢٠٧٤حَدَّثَنَا هَارُونُ بْنُ إِسْحَاقَ الْهَمْدَانِيُّ قال حَدَّثَنَا عَبْدَةُ بْنُ سُلَيْمَانَ عَنْ هِشَامِ بْنِ عُرْوَةَ عَنْ أَبِيهِ عَنْ عَائِشَةَ

أَنَّ رَسُولَ اللَّهِ ﷺ قَالَ إِنَّ الْحُمَّى مِنْ فَيْحِ جَهَنَّمَ فَأَبْرِدُوهَا بِالْمَاءِ حَدَّثَنَا هَارُونُ بْنُ إِسْحَاقَ قال حَدَّثَنَا عَبْدَةُ عَنْ هِشَامِ بْنِ عُرْوَةَ عَنْ فَاطِمَةَ بِنْتِ الْمُنْذِرِ عَنْ أَسْمَاءَ بِنْتِ أَبِي بَكْرٍ عَنِ النَّبِيِّ ﷺ نَحْوَهُ  

قَالَ أَبُو عِيسَى وَفِي حَدِيثِ أَسْمَاءَ كَلاَمٌ أَكْثَرُ مِنْ هَذَا وَكِلاَ الْحَدِيثَيْنِ صَحِيحٌ