Sahih al-Bukhari, Book 63, Hadith 107 (In-Book) ⓘ
Abu Huraira further said: "Allah's Messenger made them (i.e. the Muslims) stand in rows at the Musalla (i.e. praying place) and led the funeral prayer for the Negus and said four Takbir."
وَعَنْ صَالِحٍ، عَنِ ابْنِ شِهَابٍ، قَالَ حَدَّثَنِي سَعِيدُ بْنُ الْمُسَيَّبِ، أَنَّ أَبَا هُرَيْرَةَ ـ رضى الله عنه ـ أَخْبَرَهُمْ أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم صَفَّ بِهِمْ فِي الْمُصَلَّى، فَصَلَّى عَلَيْهِ وَكَبَّرَ أَرْبَعًا.
also referenced under: Hadith 3881 (DarusSalam) & Volume 5, Book 58, Hadith 220 (USC-MSA)