Volume 7, Book 71, Number 618:
Narrated Sahl bin Saud As-Sa’idi:
When the helmet broke on the head of the Prophet and his face became covered with blood and
his incisor tooth broke (i.e. during the battle of Uhud), ‘Ali used to bring water in his shield while
Fatima was washing the blood off his face. When Fatima saw that the bleeding increased because of
the water, she took a mat (of palm leaves), burnt it, and stuck it (the burnt ashes) on the wound of
Allah’s Apostle, whereupon the bleeding stopped.