Rush to do to good deeds before tribulations overtake you

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.  

أَنَّ رَسُولَ اللَّهِ ﷺ قَالَ: «بَادِرُوا بِالأَعْمَالِ فِتَنًا كَقِطَعِ اللَّيْلِ الْمُظْلِمِ: يُصْبِحُ الرَّجُلُ مُؤْمِنًا وَيُمْسِي كَافِرًا، أَوْ يُمْسِي مُؤْمِنًا وَيُصْبِحُ كَافِرًا، يَبِيعُ دِينَهُ بِعَرَضٍ مِنَ الدُّنْيَا۔»