Jami` at-Tirmidhi 2197
جامع الترمذي#2197SahihAnas bin Malik narrated that the Messenger of Allah(s.a.w) said:"Before the Hour there shall be Fitan like a portion of the dark night. Morning will come upon a man as a believer, who will be a disbeliever in the evening, and evening will come upon a believer, who will be a disbeliever in the morning, people will sell their religion for goods of the world
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Ahmad Muhammad ShakirHasan Sahih
Al-AlbaniHasan Sahih
Zubair Ali ZaiIsnaad Hasan
In-book reference: 33:40