Sunan At-Tirmidhi

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)