From Sahih Muslim (Hadith 7165):
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: Muslim 7165