Sahih al-Bukhari 1134
صحيح البخاري#1134SahihNarrated Qatada:Anas bin Malik said, "The Prophet (ﷺ) and Zaid bin Thabit took their Suhur together. When they finished it, the Prophet (ﷺ) stood for the (Fajr) prayer and offered it." We asked Anas, "What was the interval between their finishing the Suhur and the starting of the morning prayer?" Anas replied, "It was equal to the time taken by a person in reciting fifty verses of the Qur'an
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: 19:15