Sunan an-Nasa'i 1879
سنن النسائي#1879SahihAbu Salamah and Ibn Al-Musayyab narrated that Abu Hurairah told them, that:the Messenger of Allah had told them of the death of An-Najashi, the ruler of Ethiopia, on the day that he died, and he said: "Pray for forgiveness for your brother
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Abu GhuddahSahih
Al-AlbaniSahih
Zubair Ali ZaiSahih - Agreed Upon
In-book reference: 21:62