Musannaf Ibn Abi Shaybah 12008 — Two men buried in one grave

Muhammad bin Ishaq narrates from his father, from the elders of the Ansar, that on the day of the Battle of Uhud the bodies of Sayyiduna Abdullah bin Amr bin Haram and Sayyiduna Amr bin al-Jamuh (may Allah be pleased with them both) were brought to the Prophet (peace and blessings be upon him). He (peace and blessings be upon him) said: "Bury the two of them in a single grave, for indeed these two were true friends and companions in the world."