It was narrated from Abu Qilabah that Abu Umayyah Ad-Damri told him that:

he came to the Messenger of Allah from a journey and he was fasting. The Messenger of Allah said to him, "Won't you come and have meal for the breakfast?" He said: "I am fasting." The Messenger of Allah said: "Come and I will tell you about fasting. Allah, the mighty and sublime, has waived fasting and half of the prayer from the traveler."

أَخْبَرَنَا مُحَمَّدُ بْنُ عُبَيْدِ اللَّهِ بْنِ يَزِيدَ بْنِ إِبْرَاهِيمَ الْحَرَّانِيُّ، قَالَ حَدَّثَنَا عُثْمَانُ، قَالَ حَدَّثَنَا مُعَاوِيَةُ، عَنْ يَحْيَى بْنِ أَبِي كَثِيرٍ، عَنْ أَبِي قِلاَبَةَ، أَنَّ أَبَا أُمَيَّةَ الضَّمْرِيَّ، أَخْبَرَهُ أَنَّهُ، أَتَى رَسُولَ اللَّهِ ﷺ مِنْ سَفَرٍ وَهُوَ صَائِمٌ فَقَالَ لَهُ رَسُولُ اللَّهِ ﷺ " أَلاَ تَنْتَظِرِ الْغَدَاءَ " . قَالَ إِنِّي صَائِمٌ . فَقَالَ رَسُولُ اللَّهِ ﷺ " تَعَالَ أُخْبِرْكَ عَنِ الصِّيَامِ إِنَّ اللَّهَ عَزَّ وَجَلَّ وَضَعَ عَنِ الْمُسَافِرِ الصِّيَامَ وَنِصْفَ الصَّلاَةِ " .