I heard Abu Burda who accompanied Yazid bin Abi Kabsha on a journey. Yazid used to observe fasting on journeys. Abu Burda said to him, "I heard Abu Musa several times saying that Allah's Apostle said, 'When a slave falls ill or travels, then he will get reward similar to that he gets for good deeds practiced at home when in good health."  

قَالَ رَسُولُ اللَّهِ ﷺ إِذَا مَرِضَ الْعَبْدُ أَوْ سَافَرَ كُتِبَ لَهُ مِثْلُ مَا كَانَ يَعْمَلُ مُقِيمًا صَحِيحًا  

[Machine] I heard the Messenger of Allah ﷺ say: "Indeed, when a Muslim servant falls ill or travels, the rewards for his actions are written for him just as he used to do while he was healthy. Muhammad ﷺ said, meaning Ibn Yazid, Allah has written for him the equivalent of what he used to do while he was healthy."  

سَمِعْتُ رَسُولَ اللهِ ﷺ يَقُولُ إِنَّ الْعَبْدَ الْمُسْلِمَ إِذَا مَرِضَ أَوْ سَافَرَ كُتِبَ لَهُ مِنَ الْأَجْرِ كَمَا كَانَ يَعْمَلُ مُقِيمًا صَحِيحًا قَالَ مُحَمَّدٌ يَعْنِي ابْنَ يَزِيدَ كَتَبَ اللهُ لَهُ مِثْلَ مَا كَانَ يَعْمَلُ مُقِيمًا صَحِيحًا  

[Machine] The Messenger of Allah ﷺ said, "When the Son of Adam travels or falls ill, Allah writes for him a reward equal to what he used to do when he was healthy and at home, in good health."  

قَالَ رَسُولُ اللَّهِ ﷺ «إِذَا سَافَرَ ابْنُ آدَمَ أَوْ مَرِضَ كَتَبَ اللَّهُ لَهُ مِنَ الْأَجْرِ مِثْلَ مَا كَانَ يَعْمَلُ وَهُوَ مُقِيمٌ صَحِيحٌ»  

[Machine] The Messenger of Allah ﷺ said: "When a servant falls sick or travels, he will be rewarded for the deeds he used to do while being healthy and settled."  

قَالَ رَسُولُ اللهِ ﷺ إِذَا مَرِضَ الْعَبْدُ أَوْ سَافَرَ كُتِبَ لَهُ مِنَ الْأَجْرِ مِثْلُ مَا كَانَ يَعْمَلُ مُقِيمًا صَحِيحًا  

I heard Abu Burda who accompanied Yazid bin Abi Kabsha on a journey. Yazid used to observe fasting on journeys. Abu Burda said to him, "I heard Abu Musa several times saying that Allah's Apostle said, 'When a slave falls ill or travels, then he will get reward similar to that he gets for good deeds practiced at home when in good health." (Using translation from Bukhārī 2996)   

"إذَا مَرِضَ العبْدُ أوْ سافرَ كتبَ الله له منَ الأجْرِ مثْلَ ما كانَ يَعْمَلُ صحيحًا مقيمًا" .