"We were on a journey with the Messenger of Allah. Some of us were fasting and some of us broke their fast. The one who broke their fast had no objection to the one who fasted, and the one who fasted had no objection to the one who broke his fast. They saw that whoever had the strength to fast then that was good, and whoever was weak, then breaking it was better."
حَدَّثَنَا نَصْرُ بْنُ عَلِيٍّ، حَدَّثَنَا يَزِيدُ بْنُ زُرَيْعٍ، حَدَّثَنَا الْجُرَيْرِيُّ، ح قَالَ وَحَدَّثَنَا سُفْيَانُ بْنُ وَكِيعٍ، حَدَّثَنَا عَبْدُ الأَعْلَى بْنُ عَبْدِ الأَعْلَى، عَنِ الْجُرَيْرِيِّ، عَنْ أَبِي نَضْرَةَ، عَنْ أَبِي سَعِيدٍ الْخُدْرِيِّ، قَالَ كُنَّا نُسَافِرُ مَعَ رَسُولِ اللَّهِ صلى الله عليه وسلم فَمِنَّا الصَّائِمُ وَمِنَّا الْمُفْطِرُ فَلاَ يَجِدُ الْمُفْطِرُ عَلَى الصَّائِمِ وَلاَ الصَّائِمُ عَلَى الْمُفْطِرِ فَكَانُوا يَرَوْنَ أَنَّهُ مَنْ وَجَدَ قُوَّةً فَصَامَ فَحَسَنٌ وَمَنْ وَجَدَ ضَعْفًا فَأَفْطَرَ فَحَسَنٌ . قَالَ أَبُو عِيسَى هَذَا حَدِيثٌ حَسَنٌ صَحِيحٌ .
Tirmizi
The Book on Fasting • Hadith 712