(1)
Abu Sa'id (RAA) narrated that the Messenger of Allah (ﷺ) said:
"Stand up when you see a funeral procession, and he who accompanies it should not sit down until the coffin is placed on the ground." Agreed upon. (RU)
Reference (RU): Bulugh al-Maram 572 (RU)
In-book reference (RU): Book 3, Hadith 41 (RU)
English translation (RU): Book 3, Hadith 597 (RU)