(12) باب فِي شِدَّةِ حَرِّ نَارِ جَهَنَّمَ وَبُعْدِ قَعْرِهَا وَمَا تَأْخُذُ مِنَ الْمُعَذَّبِينَ
Abu Huraira reported Allah's Apostle (ﷺ) as saying:
The fire which sons of Adam burn is only one-seventieth 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.
Reference: Sahih Muslim 2843 a
In-book reference: Book 53, Hadith 34
USC-MSA web (English) reference(deprecated numbering scheme): Book 40, Hadith 6811