(15) باب جواز الصوم والفطر في شهر رمضان للمسافر في غير معصية إذا كان سفره مرحلتين فأكثر وأن الأفضل لمن أطاقه بلا ضرر أن يصوم ولمن يشق عليه أن يفطر
Ibn Abbas (Allah be pleased with him) reported that the Messenger of Allah (ﷺ) went out during the month of Ramadan in the year of Victory (when Mecca was conquered) and was fasting till he reached Kadid (a canal situated at a distance of forty-two miles from Mecca) and he then broke the fast. And it was the habit of the Companions of the Messenger of Allah (ﷺ) to follow him in every new thing (or act). So they followed him also (in this matter). (ES)
Reference (ES): Sahih Muslim 1113 a (ES)
In-book reference (ES): Book 13, Hadith 110 (ES)
USC-MSA web (English) reference(deprecated numbering scheme): Book 6, Hadith 2466 (ES)