Mishkat al-Masabih
Mishkat al-Masabih 1538
وَعَنْ عَبْدِ اللَّهِ بْنِ مَسْعُودٍ قَالَ: دَخَلْتُ عَلَى النَّبِيِّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ وَهُوَ يُوعَكُ فَمَسِسْتُهُ بِيَدِي فَقُلْتُ: يَا رَسُولَ اللَّهِ إِنَّكَ لَتُوعَكُ وَعْكًا شَدِيدًا. فَقَالَ النَّبِيُّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ: «أَجَلْ إِنِّي أُوعَكُ كَمَا يُوعَكُ رَجُلَانِ مِنْكُمْ» . قَالَ: فَقُلْتُ: ذَلِكَ لِأَنَّ لَكَ أَجْرَيْنِ؟ فَقَالَ: «أَجَلْ» . ثُمَّ قَالَ: «مَا مِنْ مُسْلِمٍ يُصِيبُهُ أَذًى مِنْ مَرَضٍ فَمَا سِوَاهُ إِلَّا حَطَّ اللَّهُ تَعَالَى بِهِ سَيِّئَاتِهِ كَمَا تَحُطُّ الشَّجَرَةُ وَرَقَهَا»
Abd Allah ibn Masud said: I went in to see the Prophet when he was suffering from a fever. I touched him with my hand and said: Messenger of God, you are suffering from a severe fever. The Prophet said: Yes, I suffer as two men among you do. I said: Is that because you have two rewards? He replied: Yes. Then he said: No Muslim is afflicted by harm from illness or anything else without God, Exalted, removing his sins through it, just as a tree sheds its leaves.