Riyad as-Salihin
The Book of Miscellany — Hadith #1447
وعنها رضي الله عنها قالت: نهاهم النبي صلى الله عليه وسلم عن الوصال رحمة لهم، فقالوا: إنك تواصل؟ قال:
"إني لست كهيئتكم، إني أبيت يطعمني ربي ويسقيني " ((متفق عليه)).
معناه يجعل في قوة من أكل وشرب.
The Prophet (ﷺ) prohibited his Companions out of mercy for them, from observing continuous fasting without a break. They said: “But you observe fast continuously”. He replied, “I am not like you. I spend the night while my Rubb provides me with food and drink”..(This means that Allah has bestowed upon him the power of endurance like that of a person who eats and drinks).