Sunan Abi Dawud 3172
سنن أبي داود#3172SahihNarrated 'Amir b. Rabi'ah:The Prophet (ﷺ) as saying: When you see a funeral, stand up for it till it leaves you behind or it is placed (on the ground)
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Al-AlbaniSahih
Muhammad Muhyi Al-Din Abdul HamidSahih
Zubair Ali ZaiSahih Bukhari (1307) Sahih Muslim (958)
In-book reference: 21:84