Musnad Abi Ya'la 6455 — he attended a funeral over which Marwan bin

It is narrated from the father of al-Ala' that he attended a funeral over which Marwan bin al-Hakam (may Allah have mercy on him) led the prayer. Then Sayyiduna Abu Hurayrah (may Allah be pleased with him) went along until we all sat down in the graveyard. Meanwhile Sayyiduna Abu Sa'id (may Allah be pleased with him) came and said to Marwan: "Give me your hand." Marwan gave him his hand, and he said: "Stand up." The narrator says: He stood up. Then Marwan asked: "Why did you make me stand?" Sayyiduna Abu Sa'id (may Allah be pleased with him) said that whenever the Messenger of Allah (peace and blessings be upon him) saw a funeral, he would stand until it had passed by, and he (peace and blessings be upon him) would say: "Indeed, death is a cause of alarm (a terrifying matter)." At this Marwan asked: "O Abu Hurayrah, has he spoken the truth?" Sayyiduna Abu Hurayrah (may Allah be pleased with him) said: "Yes." Marwan said: "Then what prevented you from telling me this?" Sayyiduna Abu Hurayrah (may Allah be pleased with him) said: "You were the imam, so when you sat down, I sat down too."