(56) باب ذِكْرِ الاِخْتِلاَفِ عَلَى سُلَيْمَانَ بْنِ يَسَارٍ فِي حَدِيثِ حَمْزَةَ بْنِ عَمْرٍو فِيهِ
It was narrated from Hamza bin 'Amr Al-Aslami that:
he asked the Messenger of Allah about fasting while traveling. He said: "If," then he said something to the effect that: "If you want, then fast, and if you want, then do not fast.
Reference: Sunan an-Nasa'i 2294
In-book reference: Book 22, Hadith 205
English translation: Vol. 3, Book 22, Hadith 2296