"As for news of the time (of reappearance) indeed my father told me having heard it from his father who heard it from his ancestors who heard it from Amir al-Muminin (PBUH) that it was asked from the Prophet Muhammad (PBUHHF) 'O the Apostle of Allah! When will al-Qa'im from your offspring appear? He said, 'His similitude is the similitude of the Hour (of resurrection).
None but He shall manifest it at its time. It is heavy for the heavens and the earth. It will not come to you except suddenly.
