Hadith 4:125
Abu Khalid al-Ahmar narrated to us, from Humayd, who said: I went out and fasted, so they said: "Repeat [the fast]." He said: I said: "Indeed, Anas informed me that the companions of the Messenger of Allah (may Allah bless him and grant him peace) used to travel, and the one fasting would not criticize the one not fasting, nor would the one not fasting criticize the one fasting." Then I met Ibn Abi Mulayka, and he informed me of the like of it from Aisha.
حدثنا أبو خالد الأحمر عن حميد قال خرجت فصمت فقالوا اعد قال فقلت ان أنسا اخبرني أن اصحاب رسول الله صلى الله عليه وسلم كانوا يسافرون فلا يعيب الصائم على المفطر ولا المفطر على الصائم فلقيت بن أبي مليكة فاخبرني عن عائشة بمثله