Jami` at-Tirmidhi 1934
جامع الترمذي#1934SahihAbu Hurairah narrated that it was said:" O Messenger of Allah! What is backbiting?" He said : " Mentioning your brother with that which he does not like." He said " What if what I said about him is so?" He said: "If what you said about him is so, then you have backbitten him, and if it is not as you said, then you have slandered him
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 Sahih
Zubair Ali ZaiSahih
In-book reference: 27:40