Sahih al-Bukhari 7441
صحيح البخاري#7441SahihNarrated Anas bin Malik:Allah's Messenger (ﷺ) sent for the Ansar and gathered them in a tent and said to them, "Be patient till you meet Allah and His Apostle, and I will be on the lake-Tank (Al-Kauthar)
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: 97:67