"While I was listening, Sahl bin Sa'd was asked: 'What were the wounds of the Messenger of Allah ﷺ treated with?' He said: 'None is alive who is more knowledgeable of it than I. 'Ali would come with water in his shield, and Fatimah would use it to wash his blood off,and a mat was burnt for him and his wounds were filled with it(its ashes)."  

أَسْمَعُ بِأَىِّ شَيْءٍ دُووِيَ جُرْحُ رَسُولِ اللَّهِ ﷺ فَقَالَ مَا بَقِيَ أَحَدٌ أَعْلَمُ بِهِ مِنِّي كَانَ عَلِيٌّ يَأْتِي بِالْمَاءِ فِي تُرْسِهِ وَفَاطِمَةُ تَغْسِلُ عَنْهُ الدَّمَ وَأُحْرِقَ لَهُ حَصِيرٌ فَحُشِيَ بِهِ جُرْحُهُ  

"The parable of the ill when he is cured and becomes healthy is that of hail that falls from the heavens in its purity and its color."  

قَالَ رَسُولُ اللَّهِ ﷺ إِنَّمَا مَثَلُ الْمَرِيضِ إِذَا بَرَأَ وَصَحَّ كَالْبَرْدَةِ تَقَعُ مِنَ السَّمَاءِ فِي صَفَائِهَا وَلَوْنِهَا