Messenger of Allah ﷺ entered upon a sick bedouin in whom he went to visit and said to him, "Don't worry, Tahur (i.e., your illness will be a means of cleansing of your sins), if Allah Will." The bedouin said, "Tahur! No, but it is a fever that is burning in the body of an old man and it will make him visit his grave." The Prophet ﷺ said, "Then it is so."  

أَنَّ رَسُولَ اللَّهِ ﷺ دَخَلَ عَلَى أَعْرَابِيٍّ يَعُودُهُ فَقَالَ لاَ بَأْسَ عَلَيْكَ طَهُورٌ إِنْ شَاءَ اللَّهُ قَالَ قَالَ الأَعْرَابِيُّ طَهُورٌ بَلْ هِيَ حُمَّى تَفُورُ عَلَى شَيْخٍ كَبِيرٍ تُزِيرُهُ الْقُبُورَ قَالَ النَّبِيُّ ﷺ فَنَعَمْ إِذًا  

[Machine] The Prophet Muhammad ﷺ entered upon a bedouin man who was experiencing fever. The Prophet said, "There is no harm, it is a means of purification, God willing." The man responded, "No, rather it is a severe heat upon an old and aged Sheikh who is being cooked in the graves." The Prophet ﷺ then said, "Well then, it is good."  

أَنَّ رَسُولَ اللَّهِ ﷺ دَخَلَ عَلَى أَعْرَابِيٍّ يَعُودُهُ فَقَالَ «لَا بَأْسَ طَهُورٌ إِنْ شَاءَ اللَّهُ» فَقَالَ كَلَّا بَلْ حِمَّى تَفُورُ عَلَى شَيْخٍ كَبِيرٍ تُورِدُهُ الْقُبُورَ فَقَالَ النَّبِيُّ ﷺ «فَنَعَمْ إِذًا»  

"عَنِ ابْن عَبَّاسٍ أَنَّ النَّبى ﷺ دَخَلَ عَلَى أَعْرَابِىٍّ يَعُودُهُ، فَقَالَ: طَهُورٌ إِنْ شَاءَ الله، فَقَالَ الأعْرَابِىُّ: كَلاَّ بَلْ حُمَّى تَفُورُ عَلَى شَيْخٍ كَبِيرٍ، كَيْمَا أَنْ تُزيرهُ الْقُبُورَ، فَقَالَ رَسُولُ الله ﷺ : فَنَعَمْ إِذَنْ".