Sunan Abi Dawud, Hadith 2401 ⓘ
Narrated Jabir b. 'Abd Allah : The Prophet saw a man who had been put in the shade and saw a crowd of people around him (in the course of a journey). He said: Fasting while on journey is not part of righteousness.
حَدَّثَنَا أَبُو الْوَلِيدِ الطَّيَالِسِيُّ، حَدَّثَنَا شُعْبَةُ، عَنْ مُحَمَّدِ بْنِ عَبْدِ الرَّحْمَنِ، - يَعْنِي ابْنَ سَعْدِ بْنِ زُرَارَةَ - عَنْ مُحَمَّدِ بْنِ عَمْرِو بْنِ حَسَنٍ، عَنْ جَابِرِ بْنِ عَبْدِ اللَّهِ، أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم رَأَى رَجُلاً يُظَلَّلُ عَلَيْهِ وَالزِّحَامُ عَلَيْهِ فَقَالَ " لَيْسَ مِنَ الْبِرِّ الصِّيَامُ فِي السَّفَرِ " .
also referenced under: Hadith 2407 (DarusSalam)