´It was narrated from Abu Sa'eed that a funeral passed by the Messenger of Allah and he stood up. (One of the narrators) 'Amr said:` "If a funeral passed by the Messenger of Allah he would stand up."
Hadith ReferenceSunan an-Nasa'i / The Book of Funerals / Hadith: 1920
Hadith Gradingالألبانی:صحيح الإسناد | زبیر علی زئی:صحيح