It is narrated from Hazrat Abu Hurairah (may Allah be pleased with him) that the Noble Prophet (peace and blessings be upon him) said: Protect yourselves from fasting continuously for several days with only one pre-dawn meal (suhoor). The companions (may Allah be pleased with them) submitted: O Messenger of Allah! You fast continuously in this manner? The Noble Prophet (peace and blessings be upon him) said: In this matter, you are not like me. I spend the night in such a state that my Lord Himself gives me food and drink. Therefore, impose upon yourselves only as much as you have the strength to bear.
Hadith Referenceمسند احمد / مسند المكثرين من الصحابة / 7330