Hadith 4:118
Yazid ibn Harun narrated to us, from Kahmas, who said: Salim was asked—or I asked him—about fasting while traveling. He said: "If you fast, it has sufficed for you, and if you break your fast, it has been permitted for you."
حدثنا يزيد بن هارون عن كهمس قال سئل سالم أو سألته عن الصوم في السفر فقال ان صمتم فقد أجزأ عنكم وان افطرتم فقد رخص لكم