SHAFAQNA – It is narrated from Imam Sadeq (AS) who said: The one, who denies four facts, is not our Shia and they are: 1) Meraj (ascension of the Prophet of Islam (PBUH), 2) the questions of the grave (the questions asked at the first night of the grave, such as who is your God? Who is your prophet? Who is your Imam, and other questions) 3) the current creation of heaven and hell (meaning, heaven and hell have been created, they exist; and they will not be created on the Day of Judgment) 4) intercession (intercession by Ahlul Bait (AS) with God’s permission) [1].
[1] Beharul Anwaar, Vol. 8, Page 196, Hadith 186.