عَنْ عَائِشَةَ رَضِيَ اللَّهُ عَنْهَا قَالَتْ: جَاءَ حَمْزَةُ (بْنُ عَمْرٍو) الْأَسْلَمِيُّ رَضِيَ اللَّهُ عَنْهُ إِلَى رَسُولِ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ فَقَالَ: يَا رَسُولَ اللَّهِ! إِنِّي رَجُلٌ أَسْرُدُ الصَّوْمَ، أَفَأَصُومُ فِي السَّفَرِ؟ قَالَتْ: فَقَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ: ((إِنْ شِئْتَ فَصُمْ وَإِنْ شِئْتَ فَأَفْطِرْ))
Lady Aisha (may Allah be pleased with her) narrates that Sayyiduna Hamza bin Amr Aslami (may Allah be pleased with him) came to the Messenger of Allah (peace and blessings be upon him) and said: O Messenger of Allah! I observe fasts continuously; should I fast while traveling? The Prophet (peace and blessings be upon him) said: If you wish, then fast, and if you wish, then leave it.