Sahih Bukhari
Sahih Bukhari Volume 003, Book 031, Hadith Number 168.
Hadith Section/Book: Sahih Bukhari Sahih Bukhari Book 31. Fasting
Narated By Anas bin Malik : We used to travel with the Prophet and neither did the fasting persons criticize those who were not fasting, nor did those who were not fasting criticize the fasting ones.