(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. (ES)
Reference (ES): Bulugh al-Maram 572 (ES)
In-book reference (ES): Book 3, Hadith 41 (ES)
English translation (ES): Book 3, Hadith 597 (ES)