the Messenger of Allah saw some people gathered around a man, so he asked (what was happening) and they said: "It is a man who is exhausted because of fasting." The Messenger of Allah said: "It is not righteousness to fast when traveling." (Using translation from Nasāʾī 2257)  

أَنَّ رَسُولَ اللهِ ﷺ رَأَى نَاسًا مُجْتَمِعِينَ عَلَى رَجُلٍ فَسَأَلَ فَقَالُوا رَجُلٌ أَجْهَدَهُ الصَّوْمُ فَقَالَ رَسُولُ اللهِ ﷺ «لَيْسَ مِنَ الْبِرِّ الصِّيَامُ فِي السَّفَرِ»  

[Machine] The Messenger of Allah ﷺ passed by a man who was sitting in the shade of a tree and water was being sprinkled on him. The Messenger of Allah ﷺ said, "What is the matter with your companion?" They said, "O Messenger of Allah, he is fasting." The Messenger of Allah ﷺ said, "It is not righteousness that you fast while traveling. You should take the permission granted by Allah and accept it." Abu 'Abd al-Rahman said, "This is a mistake and Muhammad ibn 'Abd al-Rahman did not hear this hadith from Jabir." 2579 Mahmoud ibn Khalid told me that al-Firiyabi said: al-Awza'i narrated to us, who said: Yahya narrated to us, who said: Muhammad ibn 'Abd al-Rahman narrated to us, who said: He narrated to me from someone who heard it from Jabir in a similar manner.  

أَنَّ رَسُولَ اللهِ ﷺ مَرَّ بِرَجُلٍ فِي ظِلِّ شَجَرَةٍ يُرَشُّ عَلَيْهِ الْمَاءُ قَالَ «مَا بَالُ صَاحِبِكُمْ هَذَا» قَالُوا يَا رَسُولَ اللهِ صَامَ قَالَ «إِنَّهُ لَيْسَ مِنَ الْبِرِّ أَنْ تَصُومُوا فِي السَّفَرِ وَعَلَيْكُمْ بِرُخْصَةِ اللهِ الَّتِي رَخَّصَ لَكُمْ فَاقْبَلُوهَا» قَالَ أَبُو عَبْدِ الرَّحْمَنِ هَذَا خَطَأٌ وَمُحَمَّدُ بْنُ عَبْدِ الرَّحْمَنِ لَمْ يَسْمَعْ هَذَا الْحَدِيثَ مِنْ جَابِرٍ 2579 أَخْبَرَنِي مَحْمُودُ بْنُ خَالِدٍ قَالَ حَدَّثَنَا الْفِرْيَابِيُّ قَالَ حَدَّثَنَا الْأَوْزَاعِيُّ قَالَ حَدَّثَنِي يَحْيَى قَالَ حَدَّثَنِي مُحَمَّدُ بْنُ عَبْدِ الرَّحْمَنِ قَالَ حَدَّثَنِي مَنْ سَمِعَ جَابِرًا نَحْوَهُ