Sahih Bukhari Volume 003, Book 031, Hadith Number 182.

Narated By Anas : The Prophet said, "Do not practice Al-Wisal (fasting continuously without breaking one's fast in the evening or eating before the following dawn)." The people said to the Prophet, "But you practice Al-Wisal?" The Prophet replied, "I am not like any of you, for I am given food and drink (by Allah) during the night."