Abu Sa'eed narrated that the Prophet (s.a.w) said:
"This fire of yours is one part from seventy parts of the fire of Hell, each part of it is like the heat of this one." (JA)
English reference (JA): Vol. 4, Book 13, Hadith 2590 (JA)
Arabic reference (JA): Book 39, Hadith 2793 (JA)