حَدَّثَنَا عَلِيُّ بْنُ مُحَمَّدٍ، حَدَّثَنَا وَكِيعٌ، عَنْ سُفْيَانَ، عَنْ مَنْصُورٍ، عَنْ مُجَاهِدٍ، عَنِ ابْنِ عَبَّاسٍ، قَالَ صَامَ رَسُولُ اللَّهِ ـ صلى الله عليه وسلم ـ فِي السَّفَرِ وَأَفْطَرَ ‏.‏

It wasnarrated that Ibn ‘Abbas said: “The Messenger of Allah (PBUH)fasted while he was traveling, and he broke his fast.” Translation Not Available

Book Ref: Sunan Ibn Majah Book 7 Hadith 1661
Web Ref:  Sunan Ibn Majah Vol 1 Book 7 Hadith 1661