The Prophet ﷺ paid a visit to a sick bedouin. The Prophet ﷺ when visiting a patient used to say, "No harm will befall you! May Allah cure you! May Allah cure you!" So the Prophet ﷺ said to the bedouin. "No harm will befall you. May Allah cure you!" The bedouin said, "You say, may Allah cure me? No, for it is a fever which boils in (the body of) an old man, and will lead him to the grave." The Prophet ﷺ said, "Yes, then may it be as you say."
أَنَّ النَّبِيَّ ﷺ دَخَلَ عَلَى أَعْرَابِيٍّ يَعُودُهُ قَالَ وَكَانَ النَّبِيُّ ﷺ إِذَا دَخَلَ عَلَى مَرِيضٍ يَعُودُهُ قَالَ لاَ بَأْسَ طَهُورٌ إِنْ شَاءَ اللَّهُ فَقَالَ لَهُ لاَ بَأْسَ طَهُورٌ إِنْ شَاءَ اللَّهُ قَالَ قُلْتَ طَهُورٌ كَلاَّ بَلْ هِيَ حُمَّى تَفُورُ أَوْ تَثُورُ عَلَى شَيْخٍ كَبِيرٍ تُزِيرُهُ الْقُبُورَ فَقَالَ النَّبِيُّ ﷺ فَنَعَمْ إِذًا