"For fever, and all pains, the Prophet ﷺ would teach them to say: Bismillahil-Kabir; a'udhu billahil-'Azimi min sharri kulli 'irqin na'arin, wa min sharri harrin-nar. (In the name of Allah the Great, I seek refuge with Allah the Magnificent from the evil of every gushing vein, and from the evil of the heat of the Fire)"  

أَنَّ النَّبِيَّ ﷺ كَانَ يُعَلِّمُهُمْ مِنَ الْحُمَّى وَمِنَ الأَوْجَاعِ كُلِّهَا أَنْ يَقُولَ بِسْمِ اللَّهِ الْكَبِيرِ أَعُوذُ بِاللَّهِ الْعَظِيمِ مِنْ شَرِّ كُلِّ عِرْقٍ نَعَّارٍ وَمِنْ شَرِّ حَرِّ النَّارِ  

"For fever, and all pains, the Prophet ﷺ would teach them to say: Bismillahil-Kabir; a'udhu billahil-'Azimi min sharri kulli 'irqin na'arin, wa min sharri harrin-nar. (In the name of Allah the Great, I seek refuge with Allah the Magnificent from the evil of every gushing vein, and from the evil of the heat of the Fire)" (Using translation from Tirmidhī 2075)   

أَنَّ رَسُولَ اللَّهِ ﷺ كَانَ يُعَلِّمُهُمْ مِنَ الْأَوْجَاعِ وَمِنَ الْحُمَّى أَنْ يَقُولَ «بِسْمِ اللَّهِ الْكَبِيرِ نَعُوذُ بِاللَّهِ الْعَظِيمِ مِنْ شَرِّ عِرْقِ نَعَّارٍ وَمَنْ شَرِّ حَرِّ النَّارِ»  

[Machine] The Messenger of Allah used to teach them all the pains and fevers, and from them was this supplication: "In the name of Allah, the Great, I seek refuge in Allah, the Almighty, from the evil of every artery that is biting and from the evil of the heat of fire."  

أَنَّ رَسُولَ اللهِ ﷺ كَانَ يُعَلِّمُهُمْ مِنَ الْأَوْجَاعِ كُلِّهَا وَمِنَ الْحُمَّى هَذَا الدُّعَاءَ «بِسْمِ اللهِ الْكَبِيرِ أَعُوذُ بِاللهِ الْعَظِيمِ منْ شَرِّ كُلِّ عِرْقٍ نَعَّارٍ وَمَنْ شَرِّ حَرِّ النَّارِ»