Sayyiduna Ibn Abbas (may Allah be pleased with them both) said: The Messenger of Allah (peace and blessings be upon him) said: "Before the Hour there will be trials like pieces of the dark night; a man will be a believer in the morning and a disbeliever in the evening, and a believer in the evening and a disbeliever in the morning. Some people will sell their religion for a small amount of worldly goods."
Hadith Referenceالمعجم الكبير للطبراني / باب العين / 11029