"Hasten to good deeds before being overtaken by tribulations that are like parts of the dark night. A man would be a believer in the morning and turn to a disbeliever in the evening, or he would be a believer in the evening and turn to a disbeliever in the morning. He sells his religion for a worldly gain.” [Muslim]"

"«بَادِرُوا بالأعمال فِتَنًا كَقِطَعِ الليل المُظْلِمِ، يُصْبِحُ الرجلُ مؤمنا ويُمْسِي كافرا، ويُمْسِي مؤمنا ويُصْبِحُ كافرا، يبيعُ دينه بِعَرَضٍ من الدنيا». [صحيح.] - [رواه مسلم.]