Sunan an-Nasa'i 2042
سنن النسائي#2042SahihIt was narrated that Abu Hurairah:Said that the Messenger of Allah announced the death of An-Najashi, the ruler of Ethiopia, to them on the day that he died, and 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 ZaiHasan
In-book reference: 21:225