Mustadrak al-Hakim — Hadith 8982N

It is narrated from Sayyiduna Abu Hurayrah (may Allah be pleased with him); he said: I heard the Messenger of Allah (peace and blessings be upon him) saying: "By the One in whose Hand is the soul of Muhammad (peace and blessings be upon him)! The distance between the edge of Hell and its bottom is such that it would take seventy years to reach its bottom."
This hadith has a sahih (authentic) chain, but the two Shaykhs did not record it.