Abu Huraira reported Allah’s Apostle (ﷺ) as saying, “The fire which sons of Adam burn is only one out of seventy part of the Fire of Hell.” His Companions said: “By Allah, even ordinary fire would have been enough (to burn people).” Thereupon he said: “It is sixty-nine parts in excess of (the heat of) fire in this world, each of them being equivalent to their heat.”
حَدَّثَنَا قُتَيْبَةُ بْنُ سَعِيدٍ، حَدَّثَنَا الْمُغِيرَةُ، – يَعْنِي ابْنَ عَبْدِ الرَّحْمَنِ الْحِزَامِيَّ – عَنْ أَبِي الزِّنَادِ، عَنِ الأَعْرَجِ، عَنْ أَبِي هُرَيْرَةَ، أَنَّ النَّبِيَّ صلى الله عليه وسلم قَالَ ” نَارُكُمْ هَذِهِ الَّتِي يُوقِدُ ابْنُ آدَمَ جُزْءٌ مِنْ سَبْعِينَ جُزْءًا مِنْ حَرِّ جَهَنَّمَ ” . قَالُوا وَاللَّهِ إِنْ كَانَتْ لَكَافِيَةً يَا رَسُولَ اللَّهِ . قَالَ ” فَإِنَّهَا فُضِّلَتْ عَلَيْهَا بِتِسْعَةٍ وَسِتِّينَ جُزْءًا كُلُّهَا مِثْلُ حَرِّهَا ” .
Reference : Sahih Muslim 2843a
In-book reference : Book 53, Hadith 34
USC-MSA web (English) reference : Book 40, Hadith 6811