Hazrat Nu’man (may Allah be pleased with him) wrote to Qais bin Haitham in a letter that you people are our brothers, but we have been present at such occasions where you were not, and we have heard things that you have not heard. The Prophet Muhammad (peace and blessings be upon him) used to say that before the Day of Judgment, tribulations will appear like the portions of a dark night. In that era, a man will be a Muslim in the morning and a disbeliever in the evening, or a Muslim in the evening and a disbeliever in the morning, and people will sell their religion and morals for a small portion of worldly goods.