Jami` at-Tirmidhi 2302
جامع الترمذي#2302SahihImran bin Husain narrated that the Messenger of Allah(s.a.w)said:"The best of people are my generation, then those who follow them,then those who follow them, then those who follow them."(He(s.a.w)said that) three times. "Then, after them a people will come who increase in fatness, loving fatness, giving testimony before they are asked for it
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Ahmad Muhammad ShakirSahih
Al-AlbaniSahih
Zubair Ali ZaiSahih
In-book reference: 35:8