"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."' (Using translation from Nasāʾī 2306)
لِرَسُولِ اللهِ ﷺ يَا رَسُولَ اللهِ أَصُومُ فِي السَّفَرِ؟ وَكَانَ كَثِيرَ الصِّيَامِ فَقَالَ لَهُ رَسُولُ اللهِ ﷺ «إِنْ شِئْتَ فَصُمْ وَإِنْ شِئْتَ فَأَفْطِرْ»