Abu Hazim reported,

People asked Sahl bin Saad al-Saidi رضي الله عنه what was used to treat the wound of the Prophet ﷺ. He replied, "No one alive knows more about it than I do. Ali used to bring water in his shield, and Fatimah would wash the blood from his face. Then a piece of mat was taken and burned, and its ashes were packed into the wound of the Messenger of Allah ﷺ."

Bukhari 3037

Sahih

حدثنا علي بن عبد الله حدثنا سفيان حدثنا

أبو حازم قال

سألوا سهل بن سعد الساعدي رضي الله عنه بأي شيء دووي جرح النبي ﷺ فقال ما بقي من الناس أحد أعلم به مني كان علي يجيء بالماء في ترسه وكانت يعني فاطمة تغسل الدم عن وجهه وأخذ حصير فأحرق ثم حشي به جرح رسول الله ﷺ

البخاري 3037صحيح
Contents
Reference
Commentary
Ayat
Collection
Sahih Bukhari
Book
Jihad and expeditions
Chapter
Treatment of wounds by burning a mat, a woman washing blood from her father's face, and carrying water in a shield
Numbering
Darussalam 3037
Bukhari 3037