Musannaf Ibn Abi Shaybah 11865 — A man accompanying a funeral: those

Waqid bin Amr bin Sa'd bin Mu'adh says: I was at a funeral and did not sit until it had been set down on the ground. Then I came to Nafi' bin Jubayr and sat with him. He said, "Why did I see that you did not sit until the funeral was set down?" I said, "Because of the hadith that reached me from Sayyiduna Abu Sa'id (may Allah be pleased with him)." Nafi' said, "Mas'ud bin al-Hakam narrated to me that Sayyiduna Ali (may Allah be pleased with him) narrated to him that the Messenger of Allah (peace and blessings be upon him) stood and then sat."