al-Mandhar bin Malik bin Qata' المنذر بن مالك بن قطعة - أبو نضرة العبدي · The Book of Fasting

"Should I fast while traveling?" He said: "If you wish then fast, and if you wish then do not fast."

O Messenger of Allah, I am a man who fasts, so should I fast while traveling? He said: "If you wish then fast, and if you wish then do not fast."

"Hamzah said to the Messenger of Allah: 'O Messenger of Allah, should I fast while traveling?' He used to fast a great deal. The Messenger of Allah said to him: "If you wish then fast and if you wish then do not fast."'