(27) باب وَقْتِ الْفَجْرِ
Narrated Anas:
Zaid bin Thabit said, "We took the "Suhur" (the meal taken before dawn while fasting is observed) with the Prophet (ﷺ) and then stood up for the (morning) prayer." I asked him how long the interval between the two (Suhur and prayer) was. He replied, 'The interval between the two was just sufficient to recite fifty to Sixth 'Ayat."
Reference: Sahih al-Bukhari 575
In-book reference: Book 9, Hadith 51
USC-MSA web (English) reference(deprecated numbering scheme): Vol. 1, Book 10, Hadith 549