Sahih al-Bukhari 672
صحيح البخاري#672SahihNarrated Anas bin Malik:Allah's Messenger (ﷺ) said, "If the supper is served start having it before praying the Maghrib prayer and do not be hasty in finishing it
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: 10:66