Musnad Ahmad

It is narrated from Hazrat Abu Hurairah (may Allah be pleased with him) that the Noble Prophet (peace and blessings be upon him) said: Destruction is for the Arabs because of those tribulations which are near, such tribulations that will be like the dark portions of the night. In that era, a person will be a believer in the morning and a disbeliever in the evening, or a believer in the evening and a disbeliever in the morning, and he will sell his religion for a small portion of worldly goods. And in that era, the one who remains steadfast on his religion will be like a person holding a burning ember in his hand.