And the Prophet Muhammad (peace and blessings be upon him) said: "Protect yourselves from fasting continuously with only one pre-dawn meal (suhoor)." The Prophet (peace and blessings be upon him) said this twice. The noble companions (may Allah be pleased with them) submitted: "O Messenger of Allah (peace and blessings be upon him), you fast continuously in this manner." The Prophet (peace and blessings be upon him) said: "You are not like me in this matter. I spend the night in such a state that my Lord Himself feeds me and gives me drink. Therefore, take upon yourselves only as much as you have the strength to bear."
Hadith Referenceمسند احمد / مسند المكثرين من الصحابة / 8181