"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