We ate the predawn meal with the Prophet ﷺ, then rose for the prayer.I asked, "How long was the interval between them?"He replied, "The length of fifty verses."
حدثنا يحيى بن موسى حدثنا أبو داود الطيالسي حدثنا هشام الدستوائي عن قتادة عن أنس بن مالك
تسحرنا مع النبي ﷺ ثم قمنا إلى الصلاة قال قلت كم كان قدر ذلك قال قدر خمسين آية
Agreed upon [by Bukhari and Muslim]. Bukhari narrated it in the Book of Fasting, chapter on how much time was there between suhoor and the Fajr prayer, hadith 1921, and Muslim narrated it in the Book of Fasting, chapter on the merit of suhoor and the emphasis on its recommendation, etc., hadith 1097, from the hadith of Hisham Dastawai, with the same chain.