It is narrated from Sayyiduna Ibn Abbas (may Allah be pleased with them both) that the Prophet (peace and blessings be upon him) used to teach us this supplication for protection from fever and every kind of pain and suffering: «بِسْمِ اللّٰهِ الْكَبِيرِ أَعُوذُ بِاللّٰهِ الْعَظِيمِ مِنْ شَرِّ عِرْقٍ نَعَّارٍ وَمِنْ شَرِّ حَرِّ النَّارِ» "In the name of Allah, the Most Great, I seek refuge with Allah, the Most Mighty, from the evil of the blazing fire and the heat of Hell."