It is narrated from Sayyiduna Abu Hurayrah (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "Hasten to righteous deeds before the appearance of trials that will be like pieces of a dark night (one after another). (In the time of these trials) a man will be a believer in the morning and become a disbeliever by evening, and he will be a believer in the evening and become a disbeliever by morning; he will sell his religion for a paltry item of worldly goods."
Hadith Referenceالمعجم الأوسط / باب الألف / 2774
Hadith Takhrij«أخرجه مسلم فى «صحيحه» برقم: 118، وابن حبان فى «صحيحه» برقم: 6704، والترمذي فى «جامعه» برقم: 2195، وأحمد فى «مسنده» برقم: 8145، 8970، 10923، وأبو يعلى فى «مسنده» برقم: 6515، والطبراني فى «الأوسط» برقم: 8789»