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)

English translation · Jami' at-Tirmidhi