Hadith 8126

وَقَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ : " نَارُكُمْ هَذِهِ ، مَا يُوقِدُ بَنُو آدَمَ ، جُزْءٌ وَاحِدٌ مِنْ سَبْعِينَ جُزْءًا مِن حَرِّ جَهَنَّمَ " ، قَالُوا : وَاللَّهِ إِنْ كَانَتْ لَكَافِيَةً يَا رَسُولَ اللَّهِ ، قَالَ : " فَإِنَّهَا فُضِّلَتْ عَلَيْهَا بِتِسْعٍ وَسِتِّينَ جُزْءًا ، كُلُّهُنَّ مِثْلُ حَرِّهَا " .
And the Prophet Muhammad (peace and blessings be upon him) said: "This fire of yours which the children of Adam kindle is one part out of seventy parts of the fire of Hell." The noble Companions (may Allah be pleased with them) said: "O Messenger of Allah! By Allah, even this one part would be sufficient." The Prophet Muhammad (peace and blessings be upon him) said: "The fire of Hell is sixty-nine times more intense than this, and each part of it is like the heat of this (worldly fire)."
Hadith Reference مسند احمد / مسند المكثرين من الصحابة / 8126
Hadith Grading حکم دارالسلام: إسناده صحيح، خ: 3265، م: 2843