It is narrated on the authority of Abu Huraira that the Messenger of Allah (ﷺ) observed:
Be prompt in doing good deeds (before you are overtaken) by turbulence which would be like a part of the dark night. During (that stormy period) a man would be a Muslim in the morning and an unbeliever in the evening or he would be a believer in the evening and an unbeliever in the morning, and would sell his faith for worldly goods.
Reference: Sahih Muslim 118 In-book : Book 1, Hadith 220 USC-MSA web (English) : Book 1, Hadith 213 (deprecated)
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