Mukhtasar Muslim (Abridged) 1976 — Intensity of Hell’s heat

Narrated from Sayyiduna Abu Hurairah (may Allah be pleased with him) that the Messenger of Allah (peace and blessings of Allah be upon him) said: This fire of yours which a man kindles is one part out of seventy parts of the fire of Hell. The people said, "O Messenger of Allah! By Allah, this (worldly) fire would have been sufficient (for burning)." He (peace be upon him) said: That (fire of Hell) is sixty-nine parts hotter than this, each part as hot as this (worldly fire).