Sahih al-Bukhari 1947
Narrated Anas bin Malik:
We used to travel with the Prophet (ﷺ) and neither did the fasting persons criticize those who were not 
fasting, nor did those who were not fasting criticize the fasting ones.
حَدَّثَنَا عَبْدُ اللَّهِ بْنُ مَسْلَمَةَ، عَنْ مَالِكٍ، عَنْ حُمَيْدٍ الطَّوِيلِ، عَنْ أَنَسِ بْنِ مَالِكٍ، قَالَ كُنَّا نُسَافِرُ مَعَ النَّبِيِّ صلى الله عليه وسلم فَلَمْ يَعِبِ الصَّائِمُ عَلَى الْمُفْطِرِ، وَلاَ الْمُفْطِرُ عَلَى الصَّائِمِ‏.‏