(58) باب ذِكْرِ الاِخْتِلاَفِ عَلَى هِشَامِ بْنِ عُرْوَةَ فِيهِ
It was narrated from Hamzah bin 'Amr Al-Aslami that he asked the Messenger of Allah:
"Should I fast while traveling?" He said: "If you wish then fast, and if you wish then do not fast."
Reference: Sunan an-Nasa'i 2304
In-book reference: Book 22, Hadith 215
English translation: Vol. 3, Book 22, Hadith 2306