Sahl bin Saad reported,

When the helmet was shattered on the head of the Messenger of Allah ﷺ, his face was bloodied and his front tooth was broken. Ali kept fetching water in his shield, and Fatimah came to wash the blood from his face. When Fatimah, peace be upon her, saw that the blood was only increasing as more water was poured, she took a piece of mat, burned it, and pressed its ashes onto the wound of the Messenger of Allah ﷺ, and the bleeding stopped.

Bukhari 5722

Sahih

حدثني سعيد بن عفير حدثنا يعقوب بن عبد الرحمن القاري عن أبي حازم

عن سهل بن سعد الساعدي قال

لما كسرت على رأس رسول الله ﷺ البيضة وأدمي وجهه وكسرت رباعيته وكان علي يختلف بالماء في المجن وجاءت فاطمة تغسل عن وجهه الدم فلما رأت فاطمة عليها السلام الدم يزيد على الماء كثرة عمدت إلى حصير فأحرقتها وألصقتها على جرح رسول الله ﷺ فرقأ الدم

البخاري 5722صحيح
Contents
Reference
Commentary
Ayat
Collection
Sahih Bukhari
Book
Medicine
Chapter
Burning a mat to stop bleeding with it
Numbering
Darussalam 5722
Bukhari 5722