Sahih al-Bukhari 2931
صحيح البخاري#2931SahihNarrated `Ali:When it was the day of the battle of Al-Ahzab (i.e. the clans), Allah's Messenger (ﷺ) said, "O Allah! Fill their (i.e. the infidels') houses and graves with fire as they busied us so much that we did not perform the prayer (i.e. `Asr) till the sun set
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: 56:144