Hadith 1980
أَخْبَرَنَا قُتَيْبَةُ، عَنْ مَالِكٍ، عَنِ ابْنِ شِهَابٍ، عَنْ سَعِيدٍ، عَنْ أَبِي هُرَيْرَةَ، أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم نَعَى لِلنَّاسِ النَّجَاشِيَّ وَخَرَجَ بِهِمْ فَصَفَّ بِهِمْ وَكَبَّرَ أَرْبَعَ تَكْبِيرَاتٍ .
It was narrated from Abu Hurairah:That the Messenger of Allah announced the death of An-Najashi to the people, and he led thme out and arranged them in rows, and said the Takbir four times
Sahih (Abu Ghuddah)
Sunan an-Nasaʾi 1980 · Book 21, Hadith 163