عَنْ أَبِي أُمَامَةَ رَضِيَ اللَّهُ عَنْهُ عَنِ النَّبِيِّ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ قَالَ الْحُمَّى مِنْ كِيرِ جَهَنَّمَ فَمَا أَصَابَ الْمُؤْمِنَ مِنْهَا كَانَ حَظَّهُ مِنَ النَّارِ
Sayyiduna Abu Umamah (may Allah be pleased with him) narrates that the Noble Prophet (peace and blessings be upon him) said: Fever is from the furnace of Hell; the amount of fever a believer experiences will be the same amount less for him from the fire, meaning that much reduction for him in the fire of Hell.