Jami` at-Tirmidhi 2318
جامع الترمذي#2318Da'ifAli bin Al-Husain narrated that the Messenger of Allah (s.a.w) said:"Surely, of the excellence of a person's Islam is that he leaves what does not concern him
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Ahmad Muhammad ShakirSahih Lighairihi
Al-AlbaniSahih
Bashar Awad MaaroufHasan
Zubair Ali ZaiDaif
In-book reference: 36:15