Imam Kazim (peace be upon him): Ishaq ibn Ammar narrated from Imam Kazim (peace be upon him) that he said: "O Ishaq! In Hell there is a wilderness called Saqar which has not breathed since the day Allah created it. If Allah were to permit it to breathe to the extent of a needle's eye, everything on the face of the earth would burn. The people of Hell seek refuge from the heat, stench and filth of this wilderness, and from the punishment Allah has prepared for its inhabitants. And in that wilderness is a mountain from whose heat, stench and filth, and from what Allah has prepared for its inhabitants, all the people of that wilderness seek refuge. And in that mountain is a valley from whose heat, stench and filth, and from what Allah has prepared for its inhabitants, the people of that mountain seek refuge. And in that valley is a well from whose burning, stench and filth, and from what Allah has prepared for its inhabitants, the people of that valley seek refuge. And in that well is a serpent from whose evil, stench and filth, and from the venom which Allah has prepared for the inhabitants of that well in that serpent's fangs, all the people of that well seek refuge. And in the belly of that serpent are seven chests in which are lodged five persons from the past nations and two persons from this nation." I said: "May I be your ransom! Who are those five, and who are the two?" He said: "As for the five: Qabil, the one who killed Habil; and Nimrud, the one [Nimrud] who disputed with Ibrahim concerning his Lord and said: 'It is I who give life and cause death,' (Baqarah/258); and Fir'awn, the one who said: أَنَا رَبُّکُمُ الْأَعْلی [I am your lord, the most high]."