Sahih al-Bukhari, Hadith 2911 ⓘ

Narrated Sahl: That he was asked about the wound of the Prophet on the day (of the battle) of Uhud. He said, "The face of the Prophet as wounded and one of his front teeth as broken and the helmet over his head was smashed. Fatima washed of the blood while `Ali held water. When she saw that bleeding was increasing continuously, she burnt a mat (of date-palm leaves) till it turned into ashes which she put over the wound and thus the bleeding ceased."

حَدَّثَنَا عَبْدُ اللَّهِ بْنُ مَسْلَمَةَ، حَدَّثَنَا عَبْدُ الْعَزِيزِ بْنُ أَبِي حَازِمٍ، عَنْ أَبِيهِ، عَنْ سَهْلٍ ـ رضى الله عنه ـ أَنَّهُ سُئِلَ عَنْ جُرْحِ النَّبِيِّ، صلى الله عليه وسلم يَوْمَ أُحُدٍ‏.‏ فَقَالَ جُرِحَ وَجْهُ النَّبِيِّ صلى الله عليه وسلم وَكُسِرَتْ رَبَاعِيَتُهُ وَهُشِمَتِ الْبَيْضَةُ عَلَى رَأْسِهِ، فَكَانَتْ فَاطِمَةُ ـ عَلَيْهَا السَّلاَمُ ـ تَغْسِلُ الدَّمَ وَعَلِيٌّ يُمْسِكُ، فَلَمَّا رَأَتْ أَنَّ الدَّمَ لاَ يَزِيدُ إِلاَّ كَثْرَةً أَخَذَتْ حَصِيرًا فَأَحْرَقَتْهُ حَتَّى صَارَ رَمَادًا ثُمَّ أَلْزَقَتْهُ، فَاسْتَمْسَكَ الدَّمُ‏.‏