Sahih Bukhari

Narrated Ash-Shaibani:Ash-Shu`bi said, ""Somebody who passed along with your Prophet (ﷺ) 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