breaking the fast is better. If fasting causes him some hardship, then fasting is disliked in his case, because undertaking hardship despite the availability of a concession suggests turning away from Allah’s concession.
Third: fasting causes him severe, unbearable hardship. In this case, fasting is prohibited for him.
The evidence for this is that when the people complained to the Prophet that fasting had become difficult for them and that they were waiting to see what the Messenger of Allah would do, he called for a vessel of water after the afternoon prayer while seated upon his camel. He took it and drank, as the people watched. Then he was told afterwards, “Some people have continued fasting.” He said, “Those are the disobedient ones; those are the disobedient ones.” (1) Thus, he described them as disobedient.
This is what appears to us from the evidence regarding the fasting of a traveller.
A related question arises: if someone who is unable to fast due to old age or an illness from which recovery is not expected travels, what should he do?
The answer is that some scholars have said: he is neither required to fast nor to offer expiation, because he is a traveller; the expiation is a substitute for fasting, and fasting is waived during travel, while he is not required to fast because he is incapable. (2)
However, this reasoning is unsound, because fasting was not obligatory upon a person in this condition in the first place. Rather, what is obligatory upon him is the expiation,