Sunan an-Nasa'i 1919
سنن النسائي#1919SahihIt 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
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Abu GhuddahSahih Isnaad
Al-AlbaniSahih Isnaad
Zubair Ali ZaiSahih
In-book reference: 21:102