Sahih al-Bukhari 1324
صحيح البخاري#1324SahihNarrated Nafi`:Ibn `Umar was told that Abu Huraira said, "Whoever accompanies the funeral procession will have a reward equal to one Qirat." Ibn `Umar said, "Abu Huraira talks of a too enormous reward." Aisha attested Abu Huraira's narration and said, "I heard Allah's Messenger (ﷺ) saying like that." Ibn `Umar said, "We have lost numerous Qirats
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Every narration in Sahih al-Bukhari is accepted as Sahih (authentic) by the established status of the book.
In-book reference: 23:80