(15) باب جواز الصوم والفطر في شهر رمضان للمسافر في غير معصية إذا كان سفره مرحلتين فأكثر وأن الأفضل لمن أطاقه بلا ضرر أن يصوم ولمن يشق عليه أن يفطر
This hadith has been narrated by Ja'far with the same chain of transmitters and he added:
It was said to him (to the Holy Prophet): There are people to whom fasting has become unbearable and they are waiting how you do. He (the Holy Prophet) then called for a cup of water when it was afternoon. The rest of the hadith is the same.
Reference: Sahih Muslim 1114 b
In-book reference: Book 13, Hadith 117
USC-MSA web (English) reference(deprecated numbering scheme): Book 6, Hadith 2473