Sahih Bukhari
Funerals (Al-Janaaiz)
Volume: 002 / Book Number: 023 / Hadith Number: 411
Narrated 'Amir:
Ibn Abbas (who was at that time a boy) said, "Allah's Apostle came to a grave and the people said, 'He or she was buried yesterday.' " Ibn Abbas added, "We aligned behind the Prophet and he led the funeral prayer of the deceased."