Sunan an-Nasa'i, Volume 3, Book 21, Hadith 1975 (DarusSalam) ⓘ
It was narrated from Jabir that: the Messenger of Allah said: "Your brother has died, so get up and offer the funeral prayer for him." So we formed two rows for him."
أَخْبَرَنَا عَلِيُّ بْنُ حُجْرٍ، قَالَ أَنْبَأَنَا إِسْمَاعِيلُ، عَنْ أَيُّوبَ، عَنْ أَبِي الزُّبَيْرِ، عَنْ جَابِرٍ، أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم قَالَ " إِنَّ أَخَاكُمْ قَدْ مَاتَ فَقُومُوا فَصَلُّوا عَلَيْهِ " . فَصَفَفْنَا عَلَيْهِ صَفَّيْنِ .
also referenced under: Hadith 1973 (Reference) & Book 21, Hadith 157 (In-Book)