Fasting

Bukhari :: Book 3 :: Volume 31 :: Hadith 144

Narrated Anas:

Zaid bin Thabit said, "We took the Suhur with the Prophet . Then he stood for the prayer." I asked, "What was the interval between the Suhur and the Adhan?" He replied, "The interval was sufficient to recite fifty verses of the Quran."