Abu Hurairah narrated that the Prophet (s.a.w) said:
"This Fire of yours, which the sons of Adam kindle, is one part from seventy parts of the heat of the Hell." They said: "By Allah! Would it not have been enough O Messenger of Allah?!" He said: "It is sixty-nine parts more – all of them similar in heat." (Sahih) (JA)
English reference (JA): Vol. 4, Book 13, Hadith 2589 (JA)
Arabic reference (JA): Book 39, Hadith 2792 (JA)