Sahih Muslim Book - 13, Hadith - 2612

حَدَّثَنَا أَبُو بَكْرِ بْنُ أَبِى شَيْبَةَ وَمُحَمَّدُ بْنُ الْمُثَنَّى وَابْنُ بَشَّارٍ جَمِيعًا عَنْ مُحَمَّدِ بْنِ جَعْفَرٍ - قَالَ أَبُو بَكْرٍ حَدَّثَنَا غُنْدَرٌ - عَنْ شُعْبَةَ عَنْ مُحَمَّدِ بْنِ عَبْدِ الرَّحْمَنِ بْنِ سَعْدٍ عَنْ مُحَمَّدِ بْنِ عَمْرِو بْنِ الْحَسَنِ عَنْ جَابِرِ بْنِ عَبْدِ اللَّهِ - رضى الله عنهما - قَالَ كَانَ رَسُولُ اللَّهِ -صلى الله عليه وسلم- فِى سَفَرٍ فَرَأَى رَجُلاً قَدِ اجْتَمَعَ النَّاسُ عَلَيْهِ وَقَدْ ظُلِّلَ عَلَيْهِ فَقَالَ « مَا لَهُ ». قَالُوا رَجُلٌ صَائِمٌ. فَقَالَ رَسُولُ اللَّهِ -صلى الله عليه وسلم- « لَيْسَ مِنَ الْبِرِّ أَنْ تَصُومُوا فِى السَّفَرِ ».

It was narrated that Jabir bin Abdullah [may Allah be pleased with them] said: “The Messenger of Allah was on a journey, and he saw a man around whom the people had gathered and he was being shaded. He said: ‘What is the matter with him?’ The said: ‘(He is) a man who is fasting.’ The Messenger of Allah (SAW) said: ‘It is not righteous for a man to fast when travelling.’”