Is it obligatory to abstain from eating for the rest of the day after reaching one's hometown in Ramadan if a traveler broke their fast due to a legitimate excuse like travel and taking medication, even though fasting does not affect their body?

Scholars have differed regarding one whose excuse permitting breaking the fast has ceased (such as a sick person who recovered, a traveler who arrived, or a menstruating woman who became pure): is he obligated to abstain from eating and drinking for the rest of the day?

The most preponderant opinion is that he is not obligated to abstain, and he only needs to make up the missed days. This is because breaking the fast was permissible for him at the beginning of the day. Support for this view comes from the statement of Abdullah ibn Mas'ud: "Whoever ate at the beginning of the day, let him eat at its end."

Accordingly, if a traveler who was breaking his fast arrived, and he found his wife had become pure from menstruation on the same day, it would be permissible for him to have intercourse with her.