Narrated `Abdullah bin Mas`ud: I visited Allah's Messenger (ﷺ) while he was suffering from a high fever. I touched him with my hand and said, "O Allah's Messenger (ﷺ)! You have a high fever." Allah's Messenger (ﷺ) said, "Yes, I have as much fever as two men of you have." I said, "Is it because you will get a double reward?" Allah's Messenger (ﷺ) said, "Yes, no Muslim is afflicted with harm because of sickness or some other inconvenience, but that Allah will remove his sins for him as a tree sheds its leaves."

Narrated `Abdullah bin Mas`ud: I visited Allah's Messenger (ﷺ) while he was suffering from a high fever. I touched him with my hand and said, "O Allah's Messenger (ﷺ)! You have a high fever." Allah's Messenger (ﷺ) said, "Yes, I have as much fever as two men of you have." I said, "Is it because you will get a double reward?" Allah's Messenger (ﷺ) said, "Yes, no Muslim is afflicted with harm because of sickness or some other inconvenience, but that Allah will remove his sins for him as a tree sheds its leaves."

حَدَّثَنَا قُتَيْبَةُ، حَدَّثَنَا جَرِيرٌ، عَنِ الأَعْمَشِ، عَنْ إِبْرَاهِيمَ التَّيْمِيِّ، عَنِ الْحَارِثِ بْنِ سُوَيْدٍ، قَالَ قَالَ عَبْدُ اللَّهِ بْنُ مَسْعُودٍ دَخَلْتُ عَلَى رَسُولِ اللَّهِ صلى الله عليه وسلم وَهْوَ يُوعَكُ فَمَسِسْتُهُ بِيَدِي فَقُلْتُ يَا رَسُولَ اللَّهِ إِنَّكَ تُوعَكُ وَعْكًا شَدِيدًا‏.‏ فَقَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم ‏"‏ أَجَلْ إِنِّي أُوعَكُ كَمَا يُوعَكُ رَجُلاَنِ مِنْكُمْ ‏"‏‏.‏ فَقُلْتُ ذَلِكَ أَنَّ لَكَ أَجْرَيْنِ‏.‏ فَقَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم ‏"‏ أَجَلْ ‏"‏‏.‏ ثُمَّ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم ‏"‏ مَا مِنْ مُسْلِمٍ يُصِيبُهُ أَذًى مَرَضٌ فَمَا سِوَاهُ إِلاَّ حَطَّ اللَّهُ لَهُ سَيِّئَاتِهِ كَمَا تَحُطُّ الشَّجَرَةُ وَرَقَهَا ‏"‏‏.‏