It is narrated from Sayyiduna Mujammi' bin Jariyah (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) went out with the funeral of a man from Banu Amr bin Awf until he reached the graveyard, and said three times: 'Al-salamu 'ala ahl al-qubur' (Peace be upon you, O people of the graves). (Then he said:) "Those of you who are believers and Muslims (peace be upon them); you have gone before us and we will follow after you; 'Afana Allahu wa iyyakum' (may Allah grant us and you well-being)."
Imam al-Tabarani (may Allah have mercy on him) said: "This hadith is narrated from Mujammi' bin Jariyah only with this chain, and Dawud bin Amr is alone in narrating it."
Hadith Referenceالمعجم الأوسط / باب الميم / 8178
Hadith Takhrij«أخرجه الطبراني فى «الكبير» برقم: 1083»