Abu Huraira reported: The Messenger of Allah, peace and blessings be upon him, said, “Hasten to perform good deeds before a tribulation which will be like the dark part of the night, in which a man will be a believer in the morning and an unbeliever in the evening, or he will be a believer in the evening and an unbeliever in the morning. He would sell his faith for some goods in the world.”
Source: Ṣaḥīḥ Muslim 118
Grade: Sahih (authentic) according to Muslim
عَنْ أَبِي هُرَيْرَةَ أَنَّ رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ قَالَ بَادِرُوا بِالْأَعْمَالِ فِتَنًا كَقِطَعِ اللَّيْلِ الْمُظْلِمِ يُصْبِحُ الرَّجُلُ مُؤْمِنًا وَيُمْسِي كَافِرًا أَوْ يُمْسِي مُؤْمِنًا وَيُصْبِحُ كَافِرًا يَبِيعُ دِينَهُ بِعَرَضٍ مِنْ الدُّنْيَا
118 صحيح مسلم كتاب الإيمان باب الحث على المبادرة بالأعمال قبل تظاهر الفتن