Sahih al-Bukhari 3954
صحيح البخاري#3954SahihNarrated Ibn `Abbas:The believers who failed to join the Ghazwa of Badr and those who took part in it are not equal (in reward)
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: 64:6