Hadith 4:97
Ghundar narrated to us, from Shu'bah, from Abu Hamzah, who said: I asked Ibn Abbas about fasting while traveling. He said: "It is hardship and ease; take the ease that Allah has granted you."
حدثنا غندر عن شعبة عن أبي حمزة قال سألت بن عباس عن الصوم في السفر فقال عسر ويسر خذ بيسر الله عليك