Jami` at-Tirmidhi 1985
جامع الترمذي#1985SahihAbu Hurairah narrated that the Messenger of Allah said:"How wonderful it is for one of them that he obeys Allah and fulfills the rights of his master." Meaning the slave. And Ka'b said: "Allah and His Messenger spoke the truth
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 - Bukhari And Muslim
In-book reference: 27:91