Saying 'Allah and His Messenger are our witnesses'

A: The author, may Allah forgive and be merciful to him, erred in writing this phrase. It is not permissible for anyone to call the Messenger (peace be upon him) to witness after his death, for he (peace be upon him) cannot know the Ghayb (the Unseen) or what his Ummah (nation based on one creed) did after his death. The Messenger of Allah (peace be upon him) is reported to have said: A group of my Sahabah (Companions) will be driven away from Hawd (the Prophet's Basin in the Hereafter) on the Day of Resurrection. I will say, '(These are) my Sahabah.' It will be said, 'You do not know what they have done after you.' May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family and Companions.