Sahih al-Bukhari 1322
Sahih al-Bukhari · Book 23: Funerals (Al-Janaa'iz) · The legal way of offering the funeral prayer
Narrated Ash-Shaibani:
حَدَّثَنَا سُلَيْمَانُ بْنُ حَرْبٍ ، حَدَّثَنَا شُعْبَةُ ، عَنِ الشَّيْبَانِيِّ ، عَنِ الشَّعْبِيِّ ، قَالَ أَخْبَرَنِي مَنْ، مَرَّ مَعَ نَبِيِّكُمْ صلى الله عليه وسلم عَلَى قَبْرٍ مَنْبُوذٍ فَأَمَّنَا فَصَفَفْنَا خَلْفَهُ . فَقُلْنَا يَا أَبَا عَمْرٍو مَنْ حَدَّثَكَ قَالَ ابْنُ عَبَّاسٍ رضى الله عنهما .
Ash-Shu`bi said, "Somebody who passed along with your Prophet (p.b.u.h) by a grave that was separate from the other graves informed me (saying), "The Prophet (ﷺ) led us (in the prayer) and we aligned behind him." We said, "O Abu `Amr! Who told you this narration?" He replied, "Ibn `Abbas."