Abu Dawud Book 2, Hadith Number 1217.
Chapter : On the shortening the recitation of the quran during prayer while travelling.
Narated By Al Bara’ : We went on a journey along with the Apostle of Allah (PBUH). He led us in the night prayer and he recited in one of the rak’ahs: “By the fig and the olive” (Surah xcv.).