Sahih al-Bukhari 553
صحيح البخاري#553SahihNarrated Abu Al-Malih [??]:We were with Buraida in a battle on a cloudy day and he said, "Offer the `Asr prayer early as the Prophet said, "Whoever leaves the `Asr prayer, all his (good) deeds will be annulled
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: 9:30