Abu Huraira (Allah be pleased with him) reported

The Messenger of Allah (ﷺ) forbade (his Companions) from observing fast uninterruptedly. One of the Muslims said: Messenger of Allah, you yourself observe Saum Wisal, whereupon the Messenger of Allah (ﷺ) said: Who among you is like me? I spend night (in a state) that my Allah feeds me and provides me drink. When they (the Companions of the Holy Prophet ) did not agree in abandoning the uninterrupted fast, then the Prophet (ﷺ) also observed this fast with them for a day, and then for a day. They then saw the new moon and he (the Holy Prophet) said: If the appearance of the new moon were delayed. I would have observed more (fasts) with you (and he did it) by way of warning to them as they had not agreed to refrain (from observing Saum Wisal)