Jami` at-Tirmidhi 1931
جامع الترمذي#1931SahihAbu Ad-Darda narrated that the Messenger of Allah said:"Whoever protects his brother's honor, Allah protects his face from the Fire on the Day of Resurrection
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
Bashar Awad MaaroufHasan
Zubair Ali ZaiHasan
In-book reference: 27:37