SHAFAQNA – Abasalt Herawi narrated that: I asked Imam Reza (AS): O’ the child of the Prophet of Allah (SWT), inform me of heaven and hell; have those two been created? Imam Reza (AS) replied: Yes; indeed, when the Prophet of Islam (PBUH) went to Meraj, ascended to (entered) heaven, and also observed the hell. Abasalt continued by saying: Some people believe that heaven and hell have been designated (by God) but they have not been created yet. Imam Reza (AS) replied: They are not from us and we are not from them. The one who rejects the creation of heaven and hell, has invented a lie against the Prophet (PBUH), and has rejected us (Ahlul Bait AS)), and does not believe our Welayah .
 Beharul Anwaar, Vol. 8, Page 119.