(20) باب بَرَكَةِ السَّحُورِ مِنْ غَيْرِ إِيجَابٍ
Narrated `Abdullah:
The Prophet (ﷺ) fasted for days continuously; the people also did the same but it was difficult for them. So, the Prophet (ﷺ) forbade them (to fast continuously for more than one day). They slid, "But you fast without break (no food was taken in the evening or in the morning)." The Prophet (ﷺ) replied, "I am not like you, for I am provided with food and drink (by Allah).
Reference: Sahih al-Bukhari 1922
In-book reference: Book 30, Hadith 31
USC-MSA web (English) reference(deprecated numbering scheme): Vol. 3, Book 31, Hadith 145