It was narrated that Ayyub said:

"Abu Qilabah narrated this Hadith to us, then he said: 'Do you want to meet the one who narrated this Hadith?' He directed me to him and I met him and he said: 'A relative of mine who was called to the Messenger of Allah concerning some camels of mine that had been taken away. When I saw him he was eating, and he called me to eat with him, but I said: 'I saw him he was eating, and he called me to eat with him, but I said: I am fasting.' He said: 'Come close and I will tell you but that. Allah has waived fasting and half of the prayer for the traveler."

أَخْبَرَنَا أَبُو بَكْرِ بْنُ عَلِيٍّ، قَالَ حَدَّثَنَا سُرَيْجٌ، قَالَ حَدَّثَنَا إِسْمَاعِيلُ ابْنُ عُلَيَّةَ، عَنْ أَيُّوبَ، قَالَ حَدَّثَنِي أَبُو قِلاَبَةَ، هَذَا الْحَدِيثَ ثُمَّ قَالَ هَلْ لَكَ فِي صَاحِبِ الْحَدِيثِ فَدَلَّنِي عَلَيْهِ فَلَقِيتُهُ فَقَالَ حَدَّثَنِي قَرِيبٌ لِي يُقَالُ لَهُ أَنَسُ بْنُ مَالِكٍ قَالَ أَتَيْتُ رَسُولَ اللَّهِ ﷺ فِي إِبِلٍ كَانَتْ لِي أُخِذَتْ فَوَافَقْتُهُ وَهُوَ يَأْكُلُ فَدَعَانِي إِلَى طَعَامِهِ فَقُلْتُ إِنِّي صَائِمٌ . فَقَالَ " ادْنُ أُخْبِرْكَ عَنْ ذَلِكَ إِنَّ اللَّهَ وَضَعَ عَنِ الْمُسَافِرِ الصَّوْمَ وَشَطْرَ الصَّلاَةِ " .