Silsilat al-Ahadith al-Sahihah

Sayyiduna Abu Hurairah (may Allah be pleased with him) reports that a man came to the Messenger of Allah (peace and blessings be upon him) and said: “O Muhammad! What is your opinion about this verse: ‘The width of Paradise is like the width of the heavens and the earth.’ (If this is the case,) then where will Hell be?” The Prophet (peace and blessings be upon him) said: “What is your opinion about the night, which during its duration covers everything over you—where is it kept (during the day)?” He said: Allah, the Exalted, knows best. The Prophet (peace and blessings be upon him) said: Allah, the Exalted, does whatever He wills, (so there is no need to think about where Hell will be).”