Mukhtasar Muslim

It is narrated from Sayyiduna Abu Hurairah, may Allah be pleased with him, that the Messenger of Allah, peace and blessings be upon him, said: Hasten to do good deeds before the trials that will be like the dark parts of the night. A man will be a believer in the morning and a disbeliever in the evening, or he will be a believer in the evening and a disbeliever in the morning, and he will sell his religion for the goods of this world.